diff --git a/src/OpenTK/Platform/MacOS/Cocoa/Cocoa.cs b/src/OpenTK/Platform/MacOS/Cocoa/Cocoa.cs
index 982f1a23..459117c1 100644
--- a/src/OpenTK/Platform/MacOS/Cocoa/Cocoa.cs
+++ b/src/OpenTK/Platform/MacOS/Cocoa/Cocoa.cs
@@ -100,6 +100,9 @@ namespace OpenTK.Platform.MacOS
         [DllImport(LibObjC, EntryPoint="objc_msgSend")]
         public extern static void SendVoid(IntPtr receiver, IntPtr selector, uint uint1);
 
+        [DllImport(LibObjC, EntryPoint="objc_msgSend")]
+        public extern static void SendVoid(IntPtr receiver, IntPtr selector, uint uint1, IntPtr intPtr1);
+
         [DllImport(LibObjC, EntryPoint="objc_msgSend")]
         public extern static void SendVoid(IntPtr receiver, IntPtr selector, IntPtr intPtr1);
 
diff --git a/src/OpenTK/Platform/MacOS/Cocoa/NSApplication.cs b/src/OpenTK/Platform/MacOS/Cocoa/NSApplication.cs
index 6f4bbf01..ba8f4683 100644
--- a/src/OpenTK/Platform/MacOS/Cocoa/NSApplication.cs
+++ b/src/OpenTK/Platform/MacOS/Cocoa/NSApplication.cs
@@ -57,6 +57,7 @@ namespace OpenTK.Platform.MacOS
 
             // Setup the application
             Cocoa.SendBool(Handle, Selector.Get("setActivationPolicy:"), (int)NSApplicationActivationPolicy.Regular);
+            Cocoa.SendVoid(Handle, Selector.Get("discardEventsMatchingMask:beforeEvent:"), uint.MaxValue, IntPtr.Zero);
             Cocoa.SendVoid(Handle, Selector.Get("activateIgnoringOtherApps:"), true);
 
             if (Cocoa.SendIntPtr(Handle, Selector.Get("mainMenu")) == IntPtr.Zero)