If you’re getting this error while installing pyglet on OSX: OSError: dlopen(/System/Library/Frameworks/QuickTime.framework/QuickTime, 6): no suitable image found. Did find: /System/Library/Frameworks/QuickTime.framework/QuickTime: mach-o, but wrong architecture /System/Library/Frameworks/QuickTime.framework/QuickTime: mach-o, but wrong architecture This means you need to set Python to 32 bit. To view a great list of easy steps, check out roguejs’ blog: http://roguejs.com/2011-11-22/getting-pyglet-to-work-on-mac-osx-lion/