Take a look in the macintosh forum, link to the right of this page under Topic Forums. There's a useful link at the top of the mac page about mac compatability particularly regarding poser. There is also a lengthy discussion on the pros and cons of buying a mac titled 'Sell me on a Macintosh" or something like that. There really aren't any problems though, converting files is automatic and takes seconds with MartinC's excellent utility that doerp told you about. A few modelling apps are PC only (3DSMax, Rhino and one or two others) otherwise no problem! Baz