[NeoGreen]

I was trying to play Civilization IV Demo I got from a Mac Addict magazine I purchased. When I installed the Demo I got an error message stating that my Mac was Below Specifications and that the game may not be able to play correctly. I installed the Demo anyway and checked to see what would happen. Well I was able to play it but, I could only see the character of the game not the surroundings. Is there something I have to install on my MacBook to be able to play Civilization on it?