Enjoy. For Future Reference when using Allegro 5.xxx: When adding the Allegro Frameworks, for some reason the "AllegroMain" framework doesn't show up in the available frameworks. Follow the instructions here until you get to the Add Frameworks section: http://wiki.allegro.cc/index.php?title=OSX,_Xcode_4,_Framework THEN: 1. Add the available Allegro Frameworks. 2. Add another framework and choose "Add Other" 3. Navigate to: Developer -> SDKs -> MacOSX 10.x sdk -> Library -> Frameworks -> - and choose AllegroMain-5.0.framework (don't navigate to headers, just choose that folder and hit open).