Spinning Cursor and unresponsive to input on OS X 10.8 Mountain Lion

Launching sample: "Immediate mode"
 
Size: 2304
System:
    Darwin
    12.0.0
    Darwin Kernel Version 12.0.0: Sun Jun 24 23:00:16 PDT 2012; root:xnu-2050.7.9~1/RELEASE_X86_64
    x86_64
Detected configuration: MacOS / Mono
CoreGraphics reported 1 display(s).
    Display 0 is at  1280x800
    Supports 16 display modes.
    Display 0 bounds: {X=0,Y=0,Width=1280,Height=800}
    DisplayDevice 1 (primary) supports 16 resolutions.
Creating default GraphicsMode (32, 16, 0, 0, 0, 2, False).
Created dummy graphics mode.
Running on Mac OS X 10.8.0.
Setting process to be foreground application.
Creating window...
    Created Window: 6669088
    Setting window title: 6669088,   CFstring : 6646384,  Text : OpenTK Window
Created window.
Titlebar size: Rect: [240, 78, 800, 22]
Attached window events.
Creating GraphicsContext.
    Created dummy graphics mode.
    GraphicsMode: Index: 1, Color: 16 (5650), Depth: 16, Stencil: 0, Samples: 0, Accum: 0 (0000), Buffers: 2, Stereo: False
    IWindowInfo: MacOS.CarbonWindowInfo: Handle 6669088
    GraphicsContextFlags: Default
    Requested version: 1.0
    Context Type: 
    Window info: MacOS.CarbonWindowInfo: Handle 6669088
    No context sharing will take place.
    AGL pixel format attributes:
        AGL_RGBA
        AGL_DOUBLEBUFFER
        AGL_RED_SIZE : 5
        AGL_GREEN_SIZE : 6
        AGL_BLUE_SIZE : 5
        AGL_ALPHA_SIZE : 0
        AGL_DEPTH_SIZE : 16
        AGL_FULLSCREEN
        AGL_NONE
    Attribute array:  4  5  8  5  9  6  10  5  11  0  12  16  54  0  
    Creating AGL context.  Sharing with 0
    IsControl: False
    context: 29433856
Loading extensions for OpenTK.Graphics.OpenGL.GL... 1900 extensions loaded in 303.0789 ms.
Setting window title: 6669088,   CFstring : 138060672,  Text : OpenTK | OpenGL 1: Immediate mode
Entering main loop.