diff --git a/shell/platform/darwin/ios/framework/Source/FlutterMetalLayer.mm b/shell/platform/darwin/ios/framework/Source/FlutterMetalLayer.mm
index b26df26ca9a8c..a4abff98d5fb7 100644
--- a/shell/platform/darwin/ios/framework/Source/FlutterMetalLayer.mm
+++ b/shell/platform/darwin/ios/framework/Source/FlutterMetalLayer.mm
@@ -4,6 +4,7 @@
 
 #import "flutter/shell/platform/darwin/ios/framework/Source/FlutterMetalLayer.h"
 
+#include <CoreMedia/CoreMedia.h>
 #include <IOSurface/IOSurfaceObjC.h>
 #include <Metal/Metal.h>
 #include <UIKit/UIKit.h>
@@ -316,9 +317,9 @@ - (IOSurface*)createIOSurface {
 
   if (self.colorspace != nil) {
     CFStringRef name = CGColorSpaceGetName(self.colorspace);
-    IOSurfaceSetValue(res, CFSTR("IOSurfaceColorSpace"), name);
+    IOSurfaceSetValue(res, kIOSurfaceColorSpace, name);
   } else {
-    IOSurfaceSetValue(res, CFSTR("IOSurfaceColorSpace"), kCGColorSpaceSRGB);
+    IOSurfaceSetValue(res, kIOSurfaceColorSpace, kCGColorSpaceSRGB);
   }
   return (__bridge_transfer IOSurface*)res;
 }
diff --git a/shell/platform/darwin/ios/framework/Source/IOKit.h b/shell/platform/darwin/ios/framework/Source/IOKit.h
index 53e8fe1b35eb4..4b1e8446af4b6 100644
--- a/shell/platform/darwin/ios/framework/Source/IOKit.h
+++ b/shell/platform/darwin/ios/framework/Source/IOKit.h
@@ -25,7 +25,7 @@ extern "C" {
 #define IOKIT
 #include <device/device_types.h>
 
-static const char* kIOServicePlane = "IOService";
+constexpr const char* kIOServicePlane = "IOService";
 
 typedef io_object_t io_registry_entry_t;
 typedef io_object_t io_service_t;
diff --git a/shell/platform/darwin/macos/framework/Source/FlutterSurface.mm b/shell/platform/darwin/macos/framework/Source/FlutterSurface.mm
index 109740942621d..83c4ea2f8ebb6 100644
--- a/shell/platform/darwin/macos/framework/Source/FlutterSurface.mm
+++ b/shell/platform/darwin/macos/framework/Source/FlutterSurface.mm
@@ -4,6 +4,7 @@
 
 #import "flutter/shell/platform/darwin/macos/framework/Source/FlutterSurface.h"
 
+#import <CoreMedia/CoreMedia.h>
 #import <Metal/Metal.h>
 
 #import "flutter/fml/platform/darwin/cf_utils.h"
@@ -74,7 +75,7 @@ + (FlutterSurface*)fromFlutterMetalTexture:(const FlutterMetalTexture*)texture {
 }
 
 + (IOSurfaceRef)createIOSurfaceWithSize:(CGSize)size {
-  unsigned pixelFormat = 'BGRA';
+  unsigned pixelFormat = kCVPixelFormatType_32BGRA;
   unsigned bytesPerElement = 4;
 
   size_t bytesPerRow = IOSurfaceAlignProperty(kIOSurfaceBytesPerRow, size.width * bytesPerElement);
@@ -89,7 +90,7 @@ + (IOSurfaceRef)createIOSurfaceWithSize:(CGSize)size {
   };
 
   IOSurfaceRef res = IOSurfaceCreate((CFDictionaryRef)options);
-  IOSurfaceSetValue(res, CFSTR("IOSurfaceColorSpace"), kCGColorSpaceSRGB);
+  IOSurfaceSetValue(res, kIOSurfaceColorSpace, kCGColorSpaceSRGB);
   return res;
 }