According to an anonymous report, Apple and ATI have been in talks about either creating or purchasing a Game Development unit.
The purpose of such a division would presumably be to create compelling games for the Mac platform to help attract more PC users to switch to the Mac platform.
Such a move would not be uncharateristic for Apple, as their decision to create Safari as well as many of their iApps were in part to fill a void not provided by 3rd party developers on the Mac platform.
Apple does appear serious about improving gaming performance on the Mac. Recent reports noted that Apple, ATI and NVidia are actively recruiting developers to improve OpenGL performance.