Go visit the forums on e-on's web site. Unfortunately, Vue 5i suffers the same fate on a Mac. I'm not sure how you've determined Vue uses an entire 2 gigs on a PC; I've loaded complex scenes and noticed the most it has ever used is under half a gig. There are known memory leaks on the PC version causing crashing, and the crashing seems just as prevalent on a Mac. The latest beta patch does not address this issue. I get a lot of crashing in the Advanced Materials Editor. Even running in compatibility mode I suffer frequent crashing, and it's not like my machine can't handle Vue.