Yes, as stated theres no problem of compatibility but the speed doesnt improve much even in G5's. I'm a Macuser since the 68000 procesors, devoted as the next one but trust me on this, if you use poser regularly, buy a windows machine. Yes it sounds like blasphemy, because Poser was first released for Macintosh I live in the belive that was Ok and doesnt need anything from the wintel guys until I used Poser 4 in a Pentium III. All my world fall apart!, it takes half the time to render anything and in a P4 its much less than that. I never leave Apple so I have now two machines in my desktop, a Mac for all the work and a P4 for 3d and Poser exclusively.