It generally works great on my Mac Pro under Crossover 6.1 (requires using a no-cd patch). I am experiencing one problem that creeps up occassionally. The screen will go black on me out of the blue, and I have no choice but to Command-Quit the application and re-start the game. It doesn't happen often, but when it does, it continues to happen with increasing frequency until I reboot the computer. I've not yet experienced this with any other app, though I have only been using this for a couple weeks now.