I've got a 2006 Mac Pro (3Ghz) running 10.7. I've been reading about the hack that enables Mavericks to run on the now, non-supported 2006-2007 Mac Pro. My question is for those who have already made the jump, how stable is the performance you're seeing? Does it crash and freeze a lot? Do all the apps work? (Heard that messages and Face Time don't). Does it support additional security updates via the App Store? Thanks!