I usually play this game on my Mac mini, since I bought it from the Mac App Store (and can run it on all high settings very well), but now that I have a better graphics card in my G5 I thought I'd give the demo a shot on my G5. Downloaded the game, created a user account, then immediately after clicking 'Start New Game' or something of that nature my whole computer locks up instead of commencing gameplay. I can't quit the app, get to a Force Quit menu, or anything. I have to hold the Power button on my machine until it completely turns off, and then turn it on again. Now I know that the game works fine, as I tried the demo before I put in my new GPU and it would run, but just wasn't playable. I'm thinking this is a driver issue, or something of that nature with the game. My 9600XT would actually run the game, it just did it badly. My 9800 Pro will not even start the game, and my whole machine locks up when I try to play. According to the web, my graphics card, CPU, RAM, etc all meet the requirements. What do you think the issue is here?