My Mac Pro has had problems with horizontal graphics tearing since I got it (stock with 7300GT). This makes playing any game that uses 3D graphics pretty terrible, yet I don't see anyone else complaining about it after searching for a very long time. The only instance I've seen of someone describing what is happening is in a review of the Mac Pro by Macintouch (here under video) . This problem has bugged me for ages and I'm very sure that its probably a driver issue, because whenever I boot into windows, presto! No more graphics tearing and everything is smooth. The most recent game I've tried this with are Doom 3 and Civilization IV. The difference is unbelievable. Even stranger is the intro movies (prerecorded) to these games ALSO suffer from the tearing mid frame! My question is, has anyone else noticed this with there Mac Pro's and does anyone know whats going on or if there is a way to fix this (besides booting into windows). Thanks!