Hi, I have the new Macbook, 2.0 GHz, 100 GB Hard drive, etc etc...very nice computer, and I'm incredibly happy I went mac. However, I've installed Sims 2, Sims 2 University, and Sims 2 Nightlife, and have yet to play without the game lagging horribly...everything goes so slow, it has become a chore to play. I don't have this problem with any other applications. I've turned the shadows, reflections on low, and it won't let me change the refresh rate (it's set on default and there are no other options or ways to change it). Any suggestions?? Anyone else going through this????