Hi. So i have a Macbook Pro, 2.4 ghz. stock. about a few months old. I'm trying to play c&c generals on it. My friend has a pre-leopard macbook pro that runs it fine. and my other friend has a macbook with leopard that runs it fine. However, when I try to play the game I have major texture problems. all of the terrain is just black. Any suggestions on how to fix my problem?