Even on a "real" PC that video chipset is bad news for games.
Try it on a macbook pro which has the real 3D chipset.
-> I could write more about this but it's all to confirm the issue without helping you find a cure.
I have a Macbook with Tiger and Windows XP and I use bootcamp. My Macbook has a 2 GHz Intel Core Duo processor and it has the Intel GMA 950 graphics card.
On the PC half of my Mac I have tried to install Sims 2, but it stops installing after a certain time. It's different everytime though. I know I have enough space on my computer, and I ran a system requirements test that said it would run on my system just not a well as it would if it had all the required stuff.
My question really is that even though my computer may have both Mac Os X and Windows is it just still a Mac? Will I have to get Sims 2 for Mac or is it just my discs? It would be nice to know.