As far as I know, Poser 4 through 9 will still run on a Mac. I bought Poser 10 for the Mac too, but haven't actually fired it up since I switched over to PCs that year. BTW, my switching from Mac to PC had nothing to do  anything except Apple was getting a little too greedy after Cook took over and kept trying to update the OS. I still use MAC every now and then, but I'm a Windows guy now.