I'm on an iMac and use StudioMaya stuff with no problems....But without Maconverter, most files won't work. You've just got to have it if you want to use Poser stuff. Try DL'ing Macinstaller, too, it'll simplify your Poser life. I keep aliases of both right on my desktop, I use them so much. And try the Macintosh scripting forum for advice--they've helped me a time or two when I was beside myself :)