I have Guitar Hero 3 for my Mac Pro and it runs like crap. I much prefer the smoother scrolling of the PlayStation 2 game. It's too bad because I kinda like the controller better than the PS2 controller. I did try turning down the settings but, the reason why I wanted it for the Mac was because I have a nice 20" Display to play it on for hi-def crisp graphics and I have to use the lowest resolution possible and it still skips and stutters. How the heck do you think this game is playable on a Mac?