Help With Command And Conquer 3!!!

Hi, I am running Command and Conquer 3 on my new macbook. I know, its not supposed to, right? Well, it does, kinda. The only problem I am having is the color of the screen. When I am playing, if I am focused on an area the is not uncovered on m map yet, it looks amazing. However, if I am over a portion that is uncovered, it has either a red , DARK red, or gold tint to it for some reason. Does anyone out there have an solution for me?

PS> other than that one small problem, the game runs great.

~Wayne

anyone??