Not sure is this helps, but this thread discusses opening AutoCAD files on a Mac. More .dwg files though. http://www.macworld.com/forums/ubbthreads/showflat.php?Cat=&Board=UBB2&Numbe r=137796&page=15&view=collapsed&sb=5&o=&fpart=1 You could try... > From: "Dr. Trevor J. Hutley" <hutley at geneva-link.ch> > Reply-To: PowerBook G4 Titanium List <Titanium at lists.themacintoshguy.com> > Date: Mon, 9 Aug 2004 15:11:52 +0200 > To: PowerBook G4 Titanium List <Titanium at lists.themacintoshguy.com> > Subject: [Ti] viewing Autocad files on my Powerbook > > > I have just received some Autocad files (.STL stereolithography) > which I would like to view on my Powerbook under OSX 10.3.4.