diff --git a/engine/src/flutter/ci/builders/mac_unopt.json b/engine/src/flutter/ci/builders/mac_unopt.json
index 746e049acb..9a6c3524e6 100644
--- a/engine/src/flutter/ci/builders/mac_unopt.json
+++ b/engine/src/flutter/ci/builders/mac_unopt.json
@@ -473,87 +473,6 @@
                     "script": "flutter/testing/ios_scenario_app/run_ios_tests.sh"
                 }
             ]
-        },
-        {
-            "cas_archive": false,
-            "drone_dimensions":
-            [
-                "os=Mac-13|Mac-14",
-                "device_type=none"
-            ],
-            "gclient_variables":
-            {
-                "download_android_deps": false,
-                "use_rbe": true
-            },
-            "gn":
-            [
-                "--ios",
-                "--runtime-mode",
-                "release",
-                "--no-stripped",
-                "--no-lto",
-                "--xcode-symlinks",
-                "--rbe",
-                "--no-goma",
-                "--slimpeller"
-            ],
-            "name": "ci/macos/ios_release_slimpeller",
-            "description": "Builds a Slimpeller release mode engine that targets iOS from a macOS host.",
-            "ninja":
-            {
-                "config": "ios_release_slimpeller",
-                "targets":
-                []
-            },
-            "properties":
-            {
-                "$flutter/osx_sdk":
-                {
-                    "sdk_version": "15a240d"
-                }
-            }
-        },
-        {
-            "cas_archive": false,
-            "drone_dimensions":
-            [
-                "os=Mac-13|Mac-14",
-                "device_type=none"
-            ],
-            "gclient_variables":
-            {
-                "download_android_deps": false,
-                "use_rbe": true
-            },
-            "gn":
-            [
-                "--ios",
-                "--runtime-mode",
-                "debug",
-                "--unoptimized",
-                "--no-stripped",
-                "--no-lto",
-                "--xcode-symlinks",
-                "--rbe",
-                "--no-goma",
-                "--slimpeller"
-            ],
-            "name": "ci/macos/ios_debug_unopt_slimpeller",
-            "description": "Builds an unoptimized debug mode engine with Slimpeller that targets iOS from a macOS host.",
-            "ninja":
-            {
-                "config": "ios_debug_unopt_slimpeller",
-                "targets":
-                []
-            },
-            "properties":
-            {
-                "$flutter/osx_sdk":
-                {
-                    "sdk_version": "15a240d"
-                }
-            }
         }
     ]
 }
diff --git a/engine/src/flutter/lib/ui/compositing/scene.cc b/engine/src/flutter/lib/ui/compositing/scene.cc
index 2208023274..8bf7c2a869 100644
--- a/engine/src/flutter/lib/ui/compositing/scene.cc
+++ b/engine/src/flutter/lib/ui/compositing/scene.cc
@@ -76,7 +76,7 @@ static sk_sp<DlImage> CreateDeferredImage(
     std::unique_ptr<LayerTree> layer_tree,
     fml::TaskRunnerAffineWeakPtr<SnapshotDelegate> snapshot_delegate,
     fml::RefPtr<fml::TaskRunner> raster_task_runner,
-    fml::RefPtr<SkiaUnrefQueue> unref_queue) {
+    const fml::RefPtr<SkiaUnrefQueue>& unref_queue) {
 #if IMPELLER_SUPPORTS_RENDERING
   if (impeller) {
     return DlDeferredImageGPUImpeller::Make(std::move(layer_tree),
@@ -95,7 +95,7 @@ static sk_sp<DlImage> CreateDeferredImage(
                         kRGBA_8888_SkColorType, kPremul_SkAlphaType);
   return DlDeferredImageGPUSkia::MakeFromLayerTree(
       image_info, std::move(layer_tree), std::move(snapshot_delegate),
-      raster_task_runner, std::move(unref_queue));
+      raster_task_runner, unref_queue);
 #endif  //  SLIMPELLER
 }
 
@@ -113,8 +113,7 @@ void Scene::RasterizeToImage(uint32_t width,
   auto image = CanvasImage::Create();
   auto dl_image = CreateDeferredImage(
       dart_state->IsImpellerEnabled(), BuildLayerTree(width, height),
-      std::move(snapshot_delegate), std::move(raster_task_runner),
-      std::move(unref_queue));
+      std::move(snapshot_delegate), std::move(raster_task_runner), unref_queue);
   image->set_image(dl_image);
   image->AssociateWithDartWrapper(raw_image_handle);
 }
diff --git a/engine/src/flutter/lib/ui/painting/image_decoder.cc b/engine/src/flutter/lib/ui/painting/image_decoder.cc
index 82cd37360f..db2c8dd461 100644
--- a/engine/src/flutter/lib/ui/painting/image_decoder.cc
+++ b/engine/src/flutter/lib/ui/painting/image_decoder.cc
@@ -16,14 +16,14 @@ std::unique_ptr<ImageDecoder> ImageDecoder::Make(
     const Settings& settings,
     const TaskRunners& runners,
     std::shared_ptr<fml::ConcurrentTaskRunner> concurrent_task_runner,
-    fml::WeakPtr<IOManager> io_manager,
+    const fml::WeakPtr<IOManager>& io_manager,
     const std::shared_ptr<fml::SyncSwitch>& gpu_disabled_switch) {
 #if IMPELLER_SUPPORTS_RENDERING
   if (settings.enable_impeller) {
     return std::make_unique<ImageDecoderImpeller>(
         runners,                            //
         std::move(concurrent_task_runner),  //
-        std::move(io_manager),              //
+        io_manager,                         //
         settings.enable_wide_gamut,         //
         gpu_disabled_switch);
   }
@@ -32,7 +32,7 @@ std::unique_ptr<ImageDecoder> ImageDecoder::Make(
   return std::make_unique<ImageDecoderSkia>(
       runners,                            //
       std::move(concurrent_task_runner),  //
-      std::move(io_manager)               //
+      io_manager                          //
   );
 #else   //  !SLIMPELLER
   FML_LOG(FATAL) << "Could not setup an image decoder.";
diff --git a/engine/src/flutter/lib/ui/painting/image_decoder.h b/engine/src/flutter/lib/ui/painting/image_decoder.h
index ebb104efd4..ae87dbf092 100644
--- a/engine/src/flutter/lib/ui/painting/image_decoder.h
+++ b/engine/src/flutter/lib/ui/painting/image_decoder.h
@@ -27,7 +27,7 @@ class ImageDecoder {
       const Settings& settings,
       const TaskRunners& runners,
       std::shared_ptr<fml::ConcurrentTaskRunner> concurrent_task_runner,
-      fml::WeakPtr<IOManager> io_manager,
+      const fml::WeakPtr<IOManager>& io_manager,
       const std::shared_ptr<fml::SyncSwitch>& gpu_disabled_switch);
 
   virtual ~ImageDecoder();
diff --git a/engine/src/flutter/lib/ui/painting/multi_frame_codec.cc b/engine/src/flutter/lib/ui/painting/multi_frame_codec.cc
index f05ff11123..73b5550c9e 100644
--- a/engine/src/flutter/lib/ui/painting/multi_frame_codec.cc
+++ b/engine/src/flutter/lib/ui/painting/multi_frame_codec.cc
@@ -55,10 +55,10 @@ static void InvokeNextFrameCallback(
 
 std::pair<sk_sp<DlImage>, std::string>
 MultiFrameCodec::State::GetNextFrameImage(
-    fml::WeakPtr<GrDirectContext> resourceContext,
+    const fml::WeakPtr<GrDirectContext>& resourceContext,
     const std::shared_ptr<const fml::SyncSwitch>& gpu_disable_sync_switch,
     const std::shared_ptr<impeller::Context>& impeller_context,
-    fml::RefPtr<flutter::SkiaUnrefQueue> unref_queue) {
+    const fml::RefPtr<flutter::SkiaUnrefQueue>& unref_queue) {
   SkBitmap bitmap = SkBitmap();
   SkImageInfo info = generator_->GetInfo().makeColorType(kN32_SkColorType);
   if (info.alphaType() == kUnpremul_SkAlphaType) {
@@ -175,7 +175,7 @@ MultiFrameCodec::State::GetNextFrameImage(
             }
           }));
 
-  return std::make_pair(DlImageGPU::Make({skImage, std::move(unref_queue)}),
+  return std::make_pair(DlImageGPU::Make({skImage, unref_queue}),
                         std::string());
 #else   //  !SLIMPELLER
   return std::make_pair(nullptr, "Unsupported backend.");
@@ -185,8 +185,8 @@ MultiFrameCodec::State::GetNextFrameImage(
 void MultiFrameCodec::State::GetNextFrameAndInvokeCallback(
     std::unique_ptr<tonic::DartPersistentValue> callback,
     const fml::RefPtr<fml::TaskRunner>& ui_task_runner,
-    fml::WeakPtr<GrDirectContext> resourceContext,
-    fml::RefPtr<flutter::SkiaUnrefQueue> unref_queue,
+    const fml::WeakPtr<GrDirectContext>& resourceContext,
+    const fml::RefPtr<flutter::SkiaUnrefQueue>& unref_queue,
     const std::shared_ptr<const fml::SyncSwitch>& gpu_disable_sync_switch,
     size_t trace_id,
     const std::shared_ptr<impeller::Context>& impeller_context) {
@@ -205,9 +205,8 @@ void MultiFrameCodec::State::GetNextFrameAndInvokeCallback(
   int duration = 0;
   sk_sp<DlImage> dlImage;
   std::string decode_error;
-  std::tie(dlImage, decode_error) =
-      GetNextFrameImage(std::move(resourceContext), gpu_disable_sync_switch,
-                        impeller_context, std::move(unref_queue));
+  std::tie(dlImage, decode_error) = GetNextFrameImage(
+      resourceContext, gpu_disable_sync_switch, impeller_context, unref_queue);
   if (dlImage) {
     image = CanvasImage::Create();
     image->set_image(dlImage);
diff --git a/engine/src/flutter/lib/ui/painting/multi_frame_codec.h b/engine/src/flutter/lib/ui/painting/multi_frame_codec.h
index 4a49b84570..413574a7c5 100644
--- a/engine/src/flutter/lib/ui/painting/multi_frame_codec.h
+++ b/engine/src/flutter/lib/ui/painting/multi_frame_codec.h
@@ -60,16 +60,16 @@ class MultiFrameCodec : public Codec {
     std::optional<SkIRect> restoreBGColorRect_;
 
     std::pair<sk_sp<DlImage>, std::string> GetNextFrameImage(
-        fml::WeakPtr<GrDirectContext> resourceContext,
+        const fml::WeakPtr<GrDirectContext>& resourceContext,
         const std::shared_ptr<const fml::SyncSwitch>& gpu_disable_sync_switch,
         const std::shared_ptr<impeller::Context>& impeller_context,
-        fml::RefPtr<flutter::SkiaUnrefQueue> unref_queue);
+        const fml::RefPtr<flutter::SkiaUnrefQueue>& unref_queue);
 
     void GetNextFrameAndInvokeCallback(
         std::unique_ptr<tonic::DartPersistentValue> callback,
         const fml::RefPtr<fml::TaskRunner>& ui_task_runner,
-        fml::WeakPtr<GrDirectContext> resourceContext,
-        fml::RefPtr<flutter::SkiaUnrefQueue> unref_queue,
+        const fml::WeakPtr<GrDirectContext>& resourceContext,
+        const fml::RefPtr<flutter::SkiaUnrefQueue>& unref_queue,
         const std::shared_ptr<const fml::SyncSwitch>& gpu_disable_sync_switch,
         size_t trace_id,
         const std::shared_ptr<impeller::Context>& impeller_context);
diff --git a/engine/src/flutter/lib/ui/painting/picture.cc b/engine/src/flutter/lib/ui/painting/picture.cc
index 6f2a0cd5b6..3eece92e68 100644
--- a/engine/src/flutter/lib/ui/painting/picture.cc
+++ b/engine/src/flutter/lib/ui/painting/picture.cc
@@ -62,7 +62,7 @@ static sk_sp<DlImage> CreateDeferredImage(
     uint32_t height,
     fml::TaskRunnerAffineWeakPtr<SnapshotDelegate> snapshot_delegate,
     fml::RefPtr<fml::TaskRunner> raster_task_runner,
-    fml::RefPtr<SkiaUnrefQueue> unref_queue) {
+    const fml::RefPtr<SkiaUnrefQueue>& unref_queue) {
 #if IMPELLER_SUPPORTS_RENDERING
   if (impeller) {
     return DlDeferredImageGPUImpeller::Make(
@@ -77,9 +77,9 @@ static sk_sp<DlImage> CreateDeferredImage(
 #else   // SLIMPELLER
   const SkImageInfo image_info = SkImageInfo::Make(
       width, height, kRGBA_8888_SkColorType, kPremul_SkAlphaType);
-  return DlDeferredImageGPUSkia::Make(
-      image_info, std::move(display_list), std::move(snapshot_delegate),
-      raster_task_runner, std::move(unref_queue));
+  return DlDeferredImageGPUSkia::Make(image_info, std::move(display_list),
+                                      std::move(snapshot_delegate),
+                                      raster_task_runner, unref_queue);
 #endif  //  !SLIMPELLER
 }
 
@@ -99,8 +99,7 @@ void Picture::RasterizeToImageSync(sk_sp<DisplayList> display_list,
   auto image = CanvasImage::Create();
   auto dl_image = CreateDeferredImage(
       dart_state->IsImpellerEnabled(), std::move(display_list), width, height,
-      std::move(snapshot_delegate), std::move(raster_task_runner),
-      std::move(unref_queue));
+      std::move(snapshot_delegate), std::move(raster_task_runner), unref_queue);
   image->set_image(dl_image);
   image->AssociateWithDartWrapper(raw_image_handle);
 }
diff --git a/engine/src/flutter/lib/ui/snapshot_delegate.h b/engine/src/flutter/lib/ui/snapshot_delegate.h
index 5e2b6c3bee..1a89b5013b 100644
--- a/engine/src/flutter/lib/ui/snapshot_delegate.h
+++ b/engine/src/flutter/lib/ui/snapshot_delegate.h
@@ -24,7 +24,7 @@ class SnapshotDelegate {
   /// @brief      A data structure used by the Skia implementation of deferred
   ///             GPU based images.
   struct GpuImageResult {
-    GpuImageResult(
+    explicit GpuImageResult(
 #if !SLIMPELLER
         const GrBackendTexture& p_texture,
 #endif  //  !SLIMPELLER
diff --git a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterDartProject.mm b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterDartProject.mm
index 3f31c181f3..44459eb55b 100644
--- a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterDartProject.mm
+++ b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterDartProject.mm
@@ -48,7 +48,7 @@ flutter::Settings FLTDefaultSettingsForBundle(NSBundle* bundle, NSProcessInfo* p
   auto command_line = flutter::CommandLineFromNSProcessInfo(processInfoOrNil);
 
   // Precedence:
-  // 1. Settings from the specified NSBundle (except for enable-impeller).
+  // 1. Settings from the specified NSBundle.
   // 2. Settings passed explicitly via command-line arguments.
   // 3. Settings from the NSBundle with the default bundle ID.
   // 4. Settings from the main NSBundle and default values.
@@ -403,8 +403,4 @@ flutter::Settings FLTDefaultSettingsForBundle(NSBundle* bundle, NSProcessInfo* p
   return _settings.enable_wide_gamut;
 }
 
-- (BOOL)isImpellerEnabled {
-  return _settings.enable_impeller;
-}
-
 @end
diff --git a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterDartProjectTest.mm b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterDartProjectTest.mm
index fbb2cbe3c2..414761f9ad 100644
--- a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterDartProjectTest.mm
+++ b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterDartProjectTest.mm
@@ -225,34 +225,6 @@ FLUTTER_ASSERT_ARC
   }
 }
 
-- (void)testRequestsWarningWhenImpellerOptOut {
-  auto settings = FLTDefaultSettingsForBundle();
-  XCTAssertEqual(settings.warn_on_impeller_opt_out, YES);
-}
-
-- (void)testEnableImpellerSettingIsCorrectlyParsed {
-  id mockMainBundle = OCMPartialMock([NSBundle mainBundle]);
-  OCMStub([mockMainBundle objectForInfoDictionaryKey:@"FLTEnableImpeller"]).andReturn(@"YES");
-
-  auto settings = FLTDefaultSettingsForBundle();
-  // Check settings.enable_impeller value is same as the value defined in Info.plist.
-  XCTAssertEqual(settings.enable_impeller, YES);
-  [mockMainBundle stopMocking];
-}
-
-- (void)testEnableImpellerSettingIsCorrectlyOverriddenByCommandLine {
-  id mockMainBundle = OCMPartialMock([NSBundle mainBundle]);
-  OCMStub([mockMainBundle objectForInfoDictionaryKey:@"FLTEnableImpeller"]).andReturn(@"NO");
-  id mockProcessInfo = OCMPartialMock([NSProcessInfo processInfo]);
-  NSArray* arguments = @[ @"process_name", @"--enable-impeller" ];
-  OCMStub([mockProcessInfo arguments]).andReturn(arguments);
-
-  auto settings = FLTDefaultSettingsForBundle(nil, mockProcessInfo);
-  // Check settings.enable_impeller value is same as the value on command line.
-  XCTAssertEqual(settings.enable_impeller, YES);
-  [mockMainBundle stopMocking];
-}
-
 - (void)testEnableDartAssertsCommandLineArgument {
   id mockMainBundle = OCMPartialMock([NSBundle mainBundle]);
   OCMStub([mockMainBundle objectForInfoDictionaryKey:@"FLTEnableDartAsserts"]).andReturn(@"YES");
diff --git a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterDartProject_Internal.h b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterDartProject_Internal.h
index f90d44e900..7d3a3d8e5f 100644
--- a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterDartProject_Internal.h
+++ b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterDartProject_Internal.h
@@ -19,7 +19,6 @@ flutter::Settings FLTDefaultSettingsForBundle(NSBundle* _Nullable bundle = nil,
 @interface FlutterDartProject ()
 
 @property(nonatomic, readonly) BOOL isWideGamutEnabled;
-@property(nonatomic, readonly) BOOL isImpellerEnabled;
 
 /**
  * This is currently used for *only for tests* to override settings.
diff --git a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterEngine.mm b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterEngine.mm
index 9b470a8b26..df4b48f8df 100644
--- a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterEngine.mm
+++ b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterEngine.mm
@@ -264,7 +264,7 @@ static constexpr int kNumProfilerSamplesPerSec = 5;
 }
 
 - (void)recreatePlatformViewsController {
-  _renderingApi = flutter::GetRenderingAPIForProcess(FlutterView.forceSoftwareRendering);
+  _renderingApi = flutter::GetRenderingAPIForProcess(/*force_software=*/false);
   _platformViewsController = [[FlutterPlatformViewsController alloc] init];
 }
 
@@ -743,7 +743,7 @@ static flutter::ThreadHost MakeThreadHost(NSString* thread_label,
   fml::MessageLoop::EnsureInitializedForCurrentThread();
 
   uint32_t threadHostType = flutter::ThreadHost::Type::kRaster | flutter::ThreadHost::Type::kIo;
-  if (!settings.enable_impeller || !settings.merged_platform_ui_thread) {
+  if (!settings.merged_platform_ui_thread) {
     threadHostType |= flutter::ThreadHost::Type::kUi;
   }
 
@@ -802,8 +802,6 @@ static void SetEntryPoint(flutter::Settings* settings, NSString* entrypoint, NSS
     self.initialRoute = [NSString stringWithUTF8String:settings.route.c_str()];
   }
 
-  FlutterView.forceSoftwareRendering = settings.enable_software_rendering;
-
   auto platformData = [self.dartProject defaultPlatformData];
 
   SetEntryPoint(&settings, entrypoint, libraryURI);
@@ -1497,10 +1495,6 @@ static void SetEntryPoint(flutter::Settings* settings, NSString* entrypoint, NSS
   return self.dartProject;
 }
 
-- (BOOL)isUsingImpeller {
-  return self.project.isImpellerEnabled;
-}
-
 @end
 
 @implementation FlutterEngineRegistrar {
diff --git a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsController.h b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsController.h
index 165808cc69..ee5623ef89 100644
--- a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsController.h
+++ b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsController.h
@@ -72,16 +72,14 @@ NS_ASSUME_NONNULL_BEGIN
 ///
 /// Called from the raster thread.
 - (flutter::PostPrerollResult)postPrerollActionWithThreadMerger:
-                                  (const fml::RefPtr<fml::RasterThreadMerger>&)rasterThreadMerger
-                                                impellerEnabled:(BOOL)impellerEnabled;
+    (const fml::RefPtr<fml::RasterThreadMerger>&)rasterThreadMerger;
 
 /// @brief Mark the end of a compositor frame.
 ///
 /// May determine changes are required to the thread merging state.
 /// Called from the raster thread.
 - (void)endFrameWithResubmit:(BOOL)shouldResubmitFrame
-                threadMerger:(const fml::RefPtr<fml::RasterThreadMerger>&)rasterThreadMerger
-             impellerEnabled:(BOOL)impellerEnabled;
+                threadMerger:(const fml::RefPtr<fml::RasterThreadMerger>&)rasterThreadMerger;
 
 /// @brief Returns the Canvas for the overlay slice for the given platform view.
 ///
diff --git a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsController.mm b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsController.mm
index 647f68d47a..79625935bc 100644
--- a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsController.mm
+++ b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsController.mm
@@ -448,14 +448,12 @@ static bool ClipRRectContainsPlatformViewBoundingRect(const SkRRect& clip_rrect,
 }
 
 - (flutter::PostPrerollResult)postPrerollActionWithThreadMerger:
-                                  (const fml::RefPtr<fml::RasterThreadMerger>&)rasterThreadMerger
-                                                impellerEnabled:(BOOL)impellerEnabled {
+    (const fml::RefPtr<fml::RasterThreadMerger>&)rasterThreadMerger {
   return flutter::PostPrerollResult::kSuccess;
 }
 
 - (void)endFrameWithResubmit:(BOOL)shouldResubmitFrame
-                threadMerger:(const fml::RefPtr<fml::RasterThreadMerger>&)rasterThreadMerger
-             impellerEnabled:(BOOL)impellerEnabled {
+                threadMerger:(const fml::RefPtr<fml::RasterThreadMerger>&)rasterThreadMerger {
 }
 
 - (void)pushFilterToVisitedPlatformViews:(const std::shared_ptr<flutter::DlImageFilter>&)filter
diff --git a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsTest.mm b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsTest.mm
index 78f2d4ce51..7247d15764 100644
--- a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsTest.mm
+++ b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsTest.mm
@@ -324,9 +324,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -388,9 +386,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -485,9 +481,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -571,9 +565,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -657,9 +649,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -744,9 +734,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -876,9 +864,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1035,9 +1021,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1339,9 +1323,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1675,9 +1657,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1745,9 +1725,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1858,9 +1836,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1943,9 +1919,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2024,9 +1998,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2104,9 +2076,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2189,9 +2159,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2294,9 +2262,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2406,9 +2372,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2535,9 +2499,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2648,9 +2610,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2778,9 +2738,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2849,9 +2807,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2977,9 +2933,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -3094,9 +3048,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -3162,9 +3114,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -3271,9 +3221,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -3336,9 +3284,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -3401,9 +3347,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -3462,9 +3406,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -3522,9 +3464,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -3607,9 +3547,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -3665,9 +3603,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -3739,9 +3675,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -3793,15 +3727,12 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   [flutterPlatformViewsController prerollCompositeEmbeddedView:1
                                                     withParams:std::move(embeddedViewParams2)];
 
-  // SKSurface is required if the root FlutterView is present.
-  const SkImageInfo image_info = SkImageInfo::MakeN32Premul(1000, 1000);
-  sk_sp<SkSurface> mock_sk_surface = SkSurfaces::Raster(image_info);
   flutter::SurfaceFrame::FramebufferInfo framebuffer_info;
   auto mock_surface = std::make_unique<flutter::SurfaceFrame>(
-      std::move(mock_sk_surface), framebuffer_info,
+      nullptr, framebuffer_info,
       [](const flutter::SurfaceFrame& surface_frame, flutter::DlCanvas* canvas) { return true; },
       [](const flutter::SurfaceFrame& surface_frame) { return true; },
-      /*frame_size=*/SkISize::Make(800, 600));
+      /*frame_size=*/SkISize::Make(800, 600), nullptr, /*display_list_fallback=*/true);
   XCTAssertTrue([flutterPlatformViewsController
          submitFrame:std::move(mock_surface)
       withIosContext:std::make_shared<flutter::IOSContextNoop>()]);
@@ -3826,12 +3757,11 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   [flutterPlatformViewsController prerollCompositeEmbeddedView:0
                                                     withParams:std::move(embeddedViewParams1)];
 
-  mock_sk_surface = SkSurfaces::Raster(image_info);
   mock_surface = std::make_unique<flutter::SurfaceFrame>(
-      std::move(mock_sk_surface), framebuffer_info,
+      nullptr, framebuffer_info,
       [](const flutter::SurfaceFrame& surface_frame, flutter::DlCanvas* canvas) { return true; },
       [](const flutter::SurfaceFrame& surface_frame) { return true; },
-      /*frame_size=*/SkISize::Make(800, 600));
+      /*frame_size=*/SkISize::Make(800, 600), nullptr, /*display_list_fallback=*/true);
   XCTAssertTrue([flutterPlatformViewsController
          submitFrame:std::move(mock_surface)
       withIosContext:std::make_shared<flutter::IOSContextNoop>()]);
@@ -3855,9 +3785,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -3909,15 +3837,12 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   [flutterPlatformViewsController prerollCompositeEmbeddedView:1
                                                     withParams:std::move(embeddedViewParams2)];
 
-  // SKSurface is required if the root FlutterView is present.
-  const SkImageInfo image_info = SkImageInfo::MakeN32Premul(1000, 1000);
-  sk_sp<SkSurface> mock_sk_surface = SkSurfaces::Raster(image_info);
   flutter::SurfaceFrame::FramebufferInfo framebuffer_info;
   auto mock_surface = std::make_unique<flutter::SurfaceFrame>(
-      std::move(mock_sk_surface), framebuffer_info,
+      nullptr, framebuffer_info,
       [](const flutter::SurfaceFrame& surface_frame, flutter::DlCanvas* canvas) { return true; },
       [](const flutter::SurfaceFrame& surface_frame) { return true; },
-      /*frame_size=*/SkISize::Make(800, 600));
+      /*frame_size=*/SkISize::Make(800, 600), nullptr, /*display_list_fallback=*/true);
   XCTAssertTrue([flutterPlatformViewsController
          submitFrame:std::move(mock_surface)
       withIosContext:std::make_shared<flutter::IOSContextNoop>()]);
@@ -3942,12 +3867,11 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   [flutterPlatformViewsController prerollCompositeEmbeddedView:1
                                                     withParams:std::move(embeddedViewParams2)];
 
-  mock_sk_surface = SkSurfaces::Raster(image_info);
   mock_surface = std::make_unique<flutter::SurfaceFrame>(
-      std::move(mock_sk_surface), framebuffer_info,
+      nullptr, framebuffer_info,
       [](const flutter::SurfaceFrame& surface_frame, flutter::DlCanvas* canvas) { return true; },
       [](const flutter::SurfaceFrame& surface_frame) { return true; },
-      /*frame_size=*/SkISize::Make(800, 600));
+      /*frame_size=*/SkISize::Make(800, 600), nullptr, /*display_list_fallback=*/true);
   XCTAssertTrue([flutterPlatformViewsController
          submitFrame:std::move(mock_surface)
       withIosContext:std::make_shared<flutter::IOSContextNoop>()]);
@@ -4056,9 +3980,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -4162,9 +4084,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -4255,9 +4175,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -4357,9 +4275,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -4423,14 +4339,13 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
               result:disposeResult];
     [self waitForExpectationsWithTimeout:30 handler:nil];
 
-    const SkImageInfo image_info = SkImageInfo::MakeN32Premul(1000, 1000);
-    sk_sp<SkSurface> mock_sk_surface = SkSurfaces::Raster(image_info);
     flutter::SurfaceFrame::FramebufferInfo framebuffer_info;
     auto mock_surface = std::make_unique<flutter::SurfaceFrame>(
-        std::move(mock_sk_surface), framebuffer_info,
+        nullptr, framebuffer_info,
         [](const flutter::SurfaceFrame& surface_frame, flutter::DlCanvas* canvas) { return true; },
         [](const flutter::SurfaceFrame& surface_frame) { return true; },
-        /*frame_size=*/SkISize::Make(800, 600));
+        /*frame_size=*/SkISize::Make(800, 600), nullptr,
+        /*display_list_fallback=*/true);
     XCTAssertTrue([flutterPlatformViewsController
            submitFrame:std::move(mock_surface)
         withIosContext:std::make_shared<flutter::IOSContextNoop>()]);
@@ -4452,14 +4367,12 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
     [flutterPlatformViewsController prerollCompositeEmbeddedView:1
                                                       withParams:std::move(embeddedViewParams1)];
 
-    const SkImageInfo image_info = SkImageInfo::MakeN32Premul(1000, 1000);
-    sk_sp<SkSurface> mock_sk_surface = SkSurfaces::Raster(image_info);
     flutter::SurfaceFrame::FramebufferInfo framebuffer_info;
     auto mock_surface = std::make_unique<flutter::SurfaceFrame>(
-        std::move(mock_sk_surface), framebuffer_info,
+        nullptr, framebuffer_info,
         [](const flutter::SurfaceFrame& surface_frame, flutter::DlCanvas* canvas) { return true; },
         [](const flutter::SurfaceFrame& surface_frame) { return true; },
-        /*frame_size=*/SkISize::Make(800, 600));
+        /*frame_size=*/SkISize::Make(800, 600), nullptr, /*display_list_fallback=*/true);
     XCTAssertTrue([flutterPlatformViewsController
            submitFrame:std::move(mock_surface)
         withIosContext:std::make_shared<flutter::IOSContextNoop>()]);
@@ -4483,9 +4396,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -4529,15 +4440,12 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   [flutterPlatformViewsController prerollCompositeEmbeddedView:2
                                                     withParams:std::move(embeddedViewParams)];
 
-  // SKSurface is required if the root FlutterView is present.
-  const SkImageInfo image_info = SkImageInfo::MakeN32Premul(1000, 1000);
-  sk_sp<SkSurface> mock_sk_surface = SkSurfaces::Raster(image_info);
   flutter::SurfaceFrame::FramebufferInfo framebuffer_info;
   auto mock_surface = std::make_unique<flutter::SurfaceFrame>(
-      std::move(mock_sk_surface), framebuffer_info,
+      nullptr, framebuffer_info,
       [](const flutter::SurfaceFrame& surface_frame, flutter::DlCanvas* canvas) { return true; },
       [](const flutter::SurfaceFrame& surface_frame) { return true; },
-      /*frame_size=*/SkISize::Make(800, 600));
+      /*frame_size=*/SkISize::Make(800, 600), nullptr, /*display_list_fallback=*/true);
   [flutterPlatformViewsController submitFrame:std::move(mock_surface)
                                withIosContext:std::make_shared<flutter::IOSContextNoop>()];
 
@@ -4562,9 +4470,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -4609,15 +4515,12 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   [flutterPlatformViewsController prerollCompositeEmbeddedView:2
                                                     withParams:std::move(embeddedViewParams)];
 
-  // SKSurface is required if the root FlutterView is present.
-  const SkImageInfo image_info = SkImageInfo::MakeN32Premul(1000, 1000);
-  sk_sp<SkSurface> mock_sk_surface = SkSurfaces::Raster(image_info);
   flutter::SurfaceFrame::FramebufferInfo framebuffer_info;
   auto mock_surface = std::make_unique<flutter::SurfaceFrame>(
-      std::move(mock_sk_surface), framebuffer_info,
+      nullptr, framebuffer_info,
       [](const flutter::SurfaceFrame& surface_frame, flutter::DlCanvas* canvas) { return true; },
       [](const flutter::SurfaceFrame& surface_frame) { return true; },
-      /*frame_size=*/SkISize::Make(800, 600));
+      /*frame_size=*/SkISize::Make(800, 600), nullptr, /*display_list_fallback=*/true);
   [flutterPlatformViewsController submitFrame:std::move(mock_surface)
                                withIosContext:std::make_shared<flutter::IOSContextNoop>()];
 
@@ -4669,9 +4572,7 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   flutterPlatformViewsController.taskRunner = GetDefaultTaskRunner();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/mock_delegate.settings_.enable_impeller
-          ? flutter::IOSRenderingAPI::kMetal
-          : flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/flutter::IOSRenderingAPI::kMetal,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -4721,19 +4622,17 @@ fml::RefPtr<fml::TaskRunner> GetDefaultTaskRunner() {
   [flutterPlatformViewsController prerollCompositeEmbeddedView:1
                                                     withParams:std::move(embeddedViewParams2)];
 
-  // SKSurface is required if the root FlutterView is present.
-  const SkImageInfo image_info = SkImageInfo::MakeN32Premul(1000, 1000);
-  sk_sp<SkSurface> mock_sk_surface = SkSurfaces::Raster(image_info);
   flutter::SurfaceFrame::FramebufferInfo framebuffer_info;
   std::optional<flutter::SurfaceFrame::SubmitInfo> submit_info;
   auto mock_surface = std::make_unique<flutter::SurfaceFrame>(
-      std::move(mock_sk_surface), framebuffer_info,
+      nullptr, framebuffer_info,
       [](const flutter::SurfaceFrame& surface_frame, flutter::DlCanvas* canvas) { return true; },
       [&](const flutter::SurfaceFrame& surface_frame) {
         submit_info = surface_frame.submit_info();
         return true;
       },
-      /*frame_size=*/SkISize::Make(800, 600));
+      /*frame_size=*/SkISize::Make(800, 600), nullptr,
+      /*display_list_fallback=*/true);
   mock_surface->set_submit_info({
       .frame_damage = SkIRect::MakeWH(800, 600),
       .buffer_damage = SkIRect::MakeWH(400, 600),
diff --git a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterView.h b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterView.h
index 80619e44b7..7f3a32ed63 100644
--- a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterView.h
+++ b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterView.h
@@ -13,7 +13,6 @@
 
 @protocol FlutterViewEngineDelegate <NSObject>
 
-@property(nonatomic, readonly) BOOL isUsingImpeller;
 @property(nonatomic, readonly) FlutterPlatformViewsController* platformViewsController;
 
 - (flutter::Rasterizer::Screenshot)takeScreenshot:(flutter::Rasterizer::ScreenshotType)type
@@ -44,8 +43,6 @@
 - (UIScreen*)screen;
 - (MTLPixelFormat)pixelFormat;
 
-// Set by FlutterEngine or FlutterViewController to override software rendering.
-@property(class, nonatomic) BOOL forceSoftwareRendering;
 @end
 
 #endif  // FLUTTER_SHELL_PLATFORM_DARWIN_IOS_FRAMEWORK_SOURCE_FLUTTERVIEW_H_
diff --git a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterView.mm b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterView.mm
index cab7a67e15..dd37e8a553 100644
--- a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterView.mm
+++ b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterView.mm
@@ -51,10 +51,6 @@ FLUTTER_ASSERT_ARC
   return MTLPixelFormatBGRA8Unorm;
 }
 - (BOOL)isWideGamutSupported {
-  if (!self.delegate.isUsingImpeller) {
-    return NO;
-  }
-
   FML_DCHECK(self.screen);
 
   // This predicates the decision on the capabilities of the iOS device's
@@ -105,12 +101,11 @@ static void PrintWideGamutWarningOnce() {
     layer.contentsScale = screenScale;
     layer.rasterizationScale = screenScale;
     layer.framebufferOnly = flutter::Settings::kSurfaceDataAccessible ? NO : YES;
-    BOOL isWideGamutSupported = self.isWideGamutSupported;
-    if (_isWideGamutEnabled && isWideGamutSupported) {
+    if (_isWideGamutEnabled && self.isWideGamutSupported) {
       fml::CFRef<CGColorSpaceRef> srgb(CGColorSpaceCreateWithName(kCGColorSpaceExtendedSRGB));
       layer.colorspace = srgb;
       layer.pixelFormat = MTLPixelFormatBGRA10_XR;
-    } else if (_isWideGamutEnabled && !isWideGamutSupported) {
+    } else if (_isWideGamutEnabled && !self.isWideGamutSupported) {
       PrintWideGamutWarningOnce();
     }
   }
@@ -118,19 +113,9 @@ static void PrintWideGamutWarningOnce() {
   [super layoutSubviews];
 }
 
-static BOOL _forceSoftwareRendering;
-
-+ (BOOL)forceSoftwareRendering {
-  return _forceSoftwareRendering;
-}
-
-+ (void)setForceSoftwareRendering:(BOOL)forceSoftwareRendering {
-  _forceSoftwareRendering = forceSoftwareRendering;
-}
-
 + (Class)layerClass {
   return flutter::GetCoreAnimationLayerClassForRenderingAPI(
-      flutter::GetRenderingAPIForProcess(FlutterView.forceSoftwareRendering));
+      flutter::GetRenderingAPIForProcess(/*force_software=*/false));
 }
 
 - (void)drawLayer:(CALayer*)layer inContext:(CGContextRef)context {
diff --git a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterViewController.mm b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterViewController.mm
index ad6eedc910..36e1a4897c 100644
--- a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterViewController.mm
+++ b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterViewController.mm
@@ -256,7 +256,6 @@ typedef struct MouseState {
   if (!project) {
     project = [[FlutterDartProject alloc] init];
   }
-  FlutterView.forceSoftwareRendering = project.settings.enable_software_rendering;
   FlutterEngine* engine = [[FlutterEngine alloc] initWithName:@"io.flutter"
                                                       project:project
                                        allowHeadlessExecution:self.engineAllowHeadlessExecution
diff --git a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterViewTest.mm b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterViewTest.mm
index 357c65e4c8..3b686dea82 100644
--- a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterViewTest.mm
+++ b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterViewTest.mm
@@ -10,7 +10,6 @@ FLUTTER_ASSERT_ARC
 
 @interface FakeDelegate : NSObject <FlutterViewEngineDelegate>
 @property(nonatomic) BOOL callbackCalled;
-@property(nonatomic, assign) BOOL isUsingImpeller;
 @end
 
 @implementation FakeDelegate
@@ -52,16 +51,6 @@ FLUTTER_ASSERT_ARC
   XCTAssertNil(view.backgroundColor);
 }
 
-- (void)testIgnoreWideColorWithoutImpeller {
-  FakeDelegate* delegate = [[FakeDelegate alloc] init];
-  delegate.isUsingImpeller = NO;
-  FlutterView* view = [[FlutterView alloc] initWithDelegate:delegate opaque:NO enableWideGamut:YES];
-  [view layoutSubviews];
-  XCTAssertTrue([view.layer isKindOfClass:[CAMetalLayer class]]);
-  CAMetalLayer* layer = (CAMetalLayer*)view.layer;
-  XCTAssertEqual(layer.pixelFormat, MTLPixelFormatBGRA8Unorm);
-}
-
 - (void)testLayerScalesMatchScreenAfterLayoutSubviews {
   FakeDelegate* delegate = [[FakeDelegate alloc] init];
   FlutterView* view = [[FlutterView alloc] initWithDelegate:delegate opaque:NO enableWideGamut:NO];
diff --git a/engine/src/flutter/shell/platform/darwin/ios/ios_context.h b/engine/src/flutter/shell/platform/darwin/ios/ios_context.h
index ef9a1a878f..24a887a4d8 100644
--- a/engine/src/flutter/shell/platform/darwin/ios/ios_context.h
+++ b/engine/src/flutter/shell/platform/darwin/ios/ios_context.h
@@ -39,7 +39,7 @@ class IOSContext {
  public:
   //----------------------------------------------------------------------------
   /// @brief      Create an iOS context object capable of creating the on-screen
-  ///             and off-screen GPU context for use by Skia.
+  ///             and off-screen GPU context for use by Impeller.
   ///
   ///             In case the engine does not support the specified client
   ///             rendering API, this a `nullptr` may be returned.
diff --git a/engine/src/flutter/shell/platform/darwin/ios/ios_context_metal_impeller.h b/engine/src/flutter/shell/platform/darwin/ios/ios_context_metal_impeller.h
index a672d83130..debed104dd 100644
--- a/engine/src/flutter/shell/platform/darwin/ios/ios_context_metal_impeller.h
+++ b/engine/src/flutter/shell/platform/darwin/ios/ios_context_metal_impeller.h
@@ -7,7 +7,6 @@
 
 #include "flutter/fml/macros.h"
 #include "flutter/shell/platform/darwin/graphics/FlutterDarwinContextMetalImpeller.h"
-#include "flutter/shell/platform/darwin/graphics/FlutterDarwinContextMetalSkia.h"
 #include "flutter/shell/platform/darwin/ios/ios_context.h"
 #include "impeller/display_list/aiks_context.h"
 
diff --git a/engine/src/flutter/shell/platform/darwin/ios/ios_external_view_embedder.mm b/engine/src/flutter/shell/platform/darwin/ios/ios_external_view_embedder.mm
index fa274438ba..575071c6a5 100644
--- a/engine/src/flutter/shell/platform/darwin/ios/ios_external_view_embedder.mm
+++ b/engine/src/flutter/shell/platform/darwin/ios/ios_external_view_embedder.mm
@@ -59,10 +59,8 @@ PostPrerollResult IOSExternalViewEmbedder::PostPrerollAction(
     const fml::RefPtr<fml::RasterThreadMerger>& raster_thread_merger) {
   TRACE_EVENT0("flutter", "IOSExternalViewEmbedder::PostPrerollAction");
   FML_CHECK(platform_views_controller_);
-  BOOL impeller_enabled = ios_context_->GetBackend() != IOSRenderingBackend::kSkia;
   PostPrerollResult result =
-      [platform_views_controller_ postPrerollActionWithThreadMerger:raster_thread_merger
-                                                    impellerEnabled:impeller_enabled];
+      [platform_views_controller_ postPrerollActionWithThreadMerger:raster_thread_merger];
   return result;
 }
 
@@ -94,10 +92,8 @@ void IOSExternalViewEmbedder::EndFrame(
     bool should_resubmit_frame,
     const fml::RefPtr<fml::RasterThreadMerger>& raster_thread_merger) {
   TRACE_EVENT0("flutter", "IOSExternalViewEmbedder::EndFrame");
-  BOOL impeller_enabled = ios_context_->GetBackend() != IOSRenderingBackend::kSkia;
   [platform_views_controller_ endFrameWithResubmit:should_resubmit_frame
-                                      threadMerger:raster_thread_merger
-                                   impellerEnabled:impeller_enabled];
+                                      threadMerger:raster_thread_merger];
 }
 
 // |ExternalViewEmbedder|
diff --git a/engine/src/flutter/shell/platform/darwin/ios/platform_view_ios.h b/engine/src/flutter/shell/platform/darwin/ios/platform_view_ios.h
index 74968d5629..1013aca65e 100644
--- a/engine/src/flutter/shell/platform/darwin/ios/platform_view_ios.h
+++ b/engine/src/flutter/shell/platform/darwin/ios/platform_view_ios.h
@@ -30,7 +30,7 @@ namespace flutter {
  * The shell provides and requests for UI related data and this PlatformView subclass fulfills
  * it with iOS specific capabilities. As an example, the iOS embedding (the `FlutterEngine` and the
  * `FlutterViewController`) sends pointer data to the shell and receives the shell's request for a
- * Skia GrDirectContext and supplies it.
+ * Impeller AiksContext and supplies it.
  *
  * Despite the name "view", this class is unrelated to UIViews on iOS and doesn't have the same
  * lifecycle. It's a long lived bridge owned by the `FlutterEngine` and can be attached and
diff --git a/engine/src/flutter/testing/ios_scenario_app/bin/run_ios_tests.dart b/engine/src/flutter/testing/ios_scenario_app/bin/run_ios_tests.dart
index 54c4c726fd..c98ff301fe 100644
--- a/engine/src/flutter/testing/ios_scenario_app/bin/run_ios_tests.dart
+++ b/engine/src/flutter/testing/ios_scenario_app/bin/run_ios_tests.dart
@@ -64,7 +64,6 @@ void main(List<String> args) async {
         deviceIdentifier: results.option('device-identifier')!,
         osRuntime: results.option('os-runtime')!,
         osVersion: results.option('os-version')!,
-        withImpeller: results.flag('with-impeller'),
         dumpXcresultOnFailure: dumpXcresultOnFailurePath,
       );
       completer.complete();
@@ -111,7 +110,6 @@ Future<void> _run(
   required String deviceIdentifier,
   required String osRuntime,
   required String osVersion,
-  required bool withImpeller,
   required String? dumpXcresultOnFailure,
 }) async {
   // Terminate early on SIGINT.
@@ -132,37 +130,35 @@ Future<void> _run(
 
   cleanup.add(() => _deleteIfPresent(resultBundle));
 
-  if (withImpeller) {
-    final process = await _runTests(
-      outScenariosPath: scenarioPath,
-      resultBundlePath: resultBundle.path,
-      osVersion: osVersion,
-      deviceName: deviceName,
-      iosEngineVariant: iosEngineVariant,
-    );
-    cleanup.add(process.kill);
+  final process = await _runTests(
+    outScenariosPath: scenarioPath,
+    resultBundlePath: resultBundle.path,
+    osVersion: osVersion,
+    deviceName: deviceName,
+    iosEngineVariant: iosEngineVariant,
+  );
+  cleanup.add(process.kill);
 
-    // Create a temporary directory, if needed.
-    var storePath = dumpXcresultOnFailure;
-    if (storePath == null) {
-      final dumpDir = io.Directory.systemTemp.createTempSync();
-      storePath = dumpDir.path;
-      cleanup.add(() => dumpDir.delete(recursive: true));
-    }
-
-    if (await process.exitCode != 0) {
-      final String outputPath = _zipAndStoreFailedTestResults(
-        iosEngineVariant: iosEngineVariant,
-        resultBundle: resultBundle,
-        storePath: storePath,
-      );
-      io.stderr.writeln('Failed test results are stored at $outputPath');
-      throw _ToolFailure('test failed.');
-    } else {
-      io.stderr.writeln('test succcess.');
-    }
-    _deleteIfPresent(resultBundle);
+  // Create a temporary directory, if needed.
+  var storePath = dumpXcresultOnFailure;
+  if (storePath == null) {
+    final dumpDir = io.Directory.systemTemp.createTempSync();
+    storePath = dumpDir.path;
+    cleanup.add(() => dumpDir.delete(recursive: true));
   }
+
+  if (await process.exitCode != 0) {
+    final String outputPath = _zipAndStoreFailedTestResults(
+      iosEngineVariant: iosEngineVariant,
+      resultBundle: resultBundle,
+      storePath: storePath,
+    );
+    io.stderr.writeln('Failed test results are stored at $outputPath');
+    throw _ToolFailure('test failed.');
+  } else {
+    io.stderr.writeln('test succcess.');
+  }
+  _deleteIfPresent(resultBundle);
 }
 
 /// Exception thrown when the tool should halt execution intentionally.
@@ -198,11 +194,6 @@ final _args =
         help: 'The OS version of the iOS simulator device to use.',
         defaultsTo: '17.0',
       )
-      ..addFlag(
-        'with-impeller',
-        help: 'Whether to use the Impeller backend to run the tests.',
-        defaultsTo: true,
-      )
       ..addOption(
         'dump-xcresult-on-failure',
         help:
diff --git a/engine/src/flutter/tools/gn b/engine/src/flutter/tools/gn
index 34d780f3f3..e8c4524b2e 100755
--- a/engine/src/flutter/tools/gn
+++ b/engine/src/flutter/tools/gn
@@ -451,7 +451,7 @@ def to_gn_args(args):
     gn_args['is_clang'] = True
   else:
     gn_args['is_clang'] = args.clang
-  if args.slimpeller:
+  if args.target_os == 'ios' or args.slimpeller:
     gn_args['skia_enable_graphite'] = False
     gn_args['skia_enable_ganesh'] = False
     gn_args['slimpeller'] = True