Don't do it Rob. My P5 has been unusable since I upgraded operating systems (10.4). No return feedback from curious labs ... or Apple. Going to their site to upgrade seems to be more than the site can handle. But, it is nice to know the coders were nice enough to include error messages for just about any action you take. To their credit they have put a short sweet note up saying that P5 has issues, and they have them resolved in P6. But they don't say whether or not they will ever fix P5. I'm trying not to be bitter, but it's an awesome program when it works...I love it. But... They have the market cornered on the type of software it is. (sorry daz & hash) There is lots of money being exchanged in cyberspace based on it's just being around. And really, Ive been on board since P2, but I feel that they don't have no love for us Mac folks anymore. I think on the P7 wishlist I'm gonna wish for them to have genuine concern for perception of their product. For a product that's been out for as long as they have...they're really pulling some rookie moves. Sorry Rob, the short answer is get P6 or wait for them to fix 5.