Don't think anyone is selling just Poser 4 anymore, although you can find it sometimes at auction sites like ebay. It was dual platform so even if it says PC it still has the Mac version. If you just want to try Poser, might want to look for CD magazines that offer Poser 3 free. Poser 4 is more advanced but the basics are still the same. There's also sites that still offer Poser 3 stuff. HTH- Dan