So what's up with my MacBook? I tried playing around with the Lego Digital Designer last night. It's pretty fun. It works great on my piece of crap PC at work, and amazing on my Mac Pro. But it runs like total crap on my rev 1 MacBook. (2.0 GHz, 1G RAM, 10.5.2) Here's the link if you want to try it out: http://ldd.lego.com/download/default.aspx My model has 479 pcs. It just chugs along on the MacBook and is really not usable. Maybe it's the Intel graphics? Maybe it's time for an upgrade. Can anyone else try it on a newer MacBook and let me know if it's my machine?