Switched in 2007, Poser on last years aluminum 24" iMac, no difficulties here.

I WILL tell you that there is only one thing I miss about Windows that I haven't been able to replicate on the Mac: single click when you hover on an icon. I miss it but not a deal breaker when you look at the rest of the package. Also, you should be aware that Mac hardware tends to run a generation behind "comparable" PC hardware, but I think that's an advantage: because the hardware is "proven" it is more predictable.. 

(sigh, here we go again) the primary strength of Mac OSX is that underneath its GUI runs UNIX, an industrial strength operating system under continuous development for 40 years with an emphasis on security. As a result, it is very stable and mostly invulnerable to viruses, spyware and the like. I crash the web browser from time to time but I have never been able to crash the system - and I have tried. I can give you a link right now that will kill Windows in 15 seconds, which has no effect on a Mac.

PC users like to tinker, upgrade and customize. Nothing wrong with that - except when devices don't play nice together. Because Mac hardware and software are "co-develeloped" the experience is harmonious and hassle free. The following statement will be difficult to comprehend: I spent ZERO time doing system maintenance. I haven't restarted my system in 24 days, 7 hours and 23 minutes. There is no such thing a "defragging hard drives", and it was mind-boggling at first: what do I do will all this free time? I can do art!!!!

I contacted Smith-Micro to let them know I changed platforms, I connected to the Runtime I already had and I was up and running in a few minutes. But many of the utilities are not available for the Mac. My two thoughts on this:

(1) Since I had fewer tools to work with, I got really good with Photoshop fast. Maybe not as convenient, but now I can do anything I want.

(2) this is a long shot, but if you can convince developers to give you the source code, you can recomplie for Mac OSX using tools provided with every Mac sold (xCode).

I'm not going to tell you to get a Mac but my experience has been pleasurable so far.