diff --git a/Source/OpenTK/Platform/MacOS/CarbonGLNative.cs b/Source/OpenTK/Platform/MacOS/CarbonGLNative.cs
index 29fc80c1..b15a9f7f 100644
--- a/Source/OpenTK/Platform/MacOS/CarbonGLNative.cs
+++ b/Source/OpenTK/Platform/MacOS/CarbonGLNative.cs
@@ -36,7 +36,7 @@ namespace OpenTK.Platform.MacOS
     using Carbon;
     using Graphics;
 
-    class CarbonGLNative : INativeGLWindow, INativeWindow
+    class CarbonGLNative : INativeWindow
     {
         #region Fields
 
diff --git a/Source/OpenTK/Platform/MacOS/MacOSFactory.cs b/Source/OpenTK/Platform/MacOS/MacOSFactory.cs
index 0447a1ce..15c76f15 100644
--- a/Source/OpenTK/Platform/MacOS/MacOSFactory.cs
+++ b/Source/OpenTK/Platform/MacOS/MacOSFactory.cs
@@ -33,15 +33,10 @@ namespace OpenTK.Platform.MacOS
 {
     using Graphics;
 
-    class MacOSFactory : IPlatformFactory 
+    class MacOSFactory : IPlatformFactory
     {
         #region IPlatformFactory Members
 
-        public INativeGLWindow CreateGLNative()
-        {
-            throw new NotImplementedException();
-        }
-
         public INativeWindow CreateNativeWindow(int x, int y, int width, int height, string title, GraphicsMode mode, GameWindowFlags options, DisplayDevice device)
         {
             return new CarbonGLNative(x, y, width, height, title, mode, options, device);
diff --git a/Source/OpenTK/Platform/Windows/WinFactory.cs b/Source/OpenTK/Platform/Windows/WinFactory.cs
index 11f445ae..a5efcbf2 100644
--- a/Source/OpenTK/Platform/Windows/WinFactory.cs
+++ b/Source/OpenTK/Platform/Windows/WinFactory.cs
@@ -38,11 +38,6 @@ using OpenTK.Input;
     {
         #region IPlatformFactory Members
 
-        public INativeGLWindow CreateGLNative()
-        {
-            throw new NotSupportedException();
-        }
-
         public INativeWindow CreateNativeWindow(int x, int y, int width, int height, string title, GraphicsMode mode, GameWindowFlags options, DisplayDevice device)
         {
             return new WinGLNative(x, y, width, height, title, options, device);