gistfile1.txt

 NSOpenGLPixelFormatAttribute attr[] =
    {
		NSOpenGLPFADoubleBuffer,
		NSOpenGLPFAAccelerated,
		NSOpenGLPFADepthSize, 24,
		NSOpenGLPFAMultisample,
		NSOpenGLPFASampleBuffers, 1,
		NSOpenGLPFASamples, 4,
		(NSOpenGLPixelFormatAttribute) 0
    };
    
    // Make our GL Pixel Format
    NSOpenGLPixelFormat* pf = [[NSOpenGLPixelFormat alloc] initWithAttributes:attr];
    
    if(!pf)
        NSLog(@"Could not create pixel format, falling back to simpler pixel format");
    
    NSOpenGLPixelFormatAttribute simpleattr[] =
    {
        NSOpenGLPFADoubleBuffer,
        NSOpenGLPFAAccelerated,
        (NSOpenGLPixelFormatAttribute) 0
    };

    pf = [[NSOpenGLPixelFormat alloc] initWithAttributes:simpleattr];

    if(!pf)
    {
        NSLog(@"Could not create pixel format, bailing");
        [NSApp terminate:self];
    }
    
    self.glContext = [[NSOpenGLContext alloc] initWithFormat:pf shareContext:nil];
    
    [self.glContext makeCurrentContext];