Remember that just because it means the minimum requirements, that doesn't mean that it will run usably. Even though the Core 2 Duo is a very capable CPU, the fact that the integrated graphics is siphoning memory from main RAM won't help matters. Had your system used discrete graphics (like the MacBook Pro), performance would be much better.
What you might have to do is reduce the graphic resolution as well as disable any graphic effects that might be taxing the MacBook.
• Apple iMac G5 17" (2 GHz G5) - Mac OS X 10.5.8/Ubuntu 10.04
• Asus Eee PC 901 (1.6 GHz Atom N270) - Fedora 13
• Apple Macintosh Quadra 650 (33 MHz MC68040) - Mac OS 8.1
• "JHVH-1" (2 GHz AMD Athlon XP 2400+) - Slackware 13.1