Since I spent hours scouring for the answer to this, and did not really know until I bought/installed it. I just wanted to let people know that while Sims 3 does not work on OS X on the older Macbooks (everything prior to early 2008, GMA950 integrated graphics), it DOES work if you use bootcamp and Windows XP. Not the ideal solution, but it does work and it beats not playing or upgrading hardware. For what it's worth, on my macbook (unibody) I just thought I'd mention that the port runs remarkably well in OS X.