I'm a Macintosh afficionado, and I am not planning to upgrade to P5 if and when it comes out. While I'm very impressed with quite a bit of what P5 seems to be able to do, I have yet fully to explore the possibilities P4 has to offer and my machine is a bit too wimpy to run P5 adequately-- and I JUST upgraded. ;) What's more, I'm seeing all the bug reports. Until I know that the Mac version is free of those bugs (and free of bugs that bug fixes cause that no one ever fixes because their Mac bugs on a primarily PC-user based product) I'm not springing for it. It's cash I don't have, anyway. My next purchase will be Extreme Morph 3d, now I have OSX. Personally, I'm happy with my P4 (not even Pro Pack), and I'm really having fun with it now that I have a snazzier machine on which to run it. It's stable (Poser NEVER crashes; then, most things don't), it's good, it's as much as I need.