Buy Wndows 7 and Bootcamp. There are ways to change a .pdo to a .pdf, but you cannot do or ask that of a member unless the author of that model has authorized that such re-distribution be allowed. You cannot do that procedure on a Mac. Actually, when it comes to paper models, or CAD, there are so many programs that do not work on Mac, a P.C., for purely pragmatic reasons may be in your future.
Such redistribution would be in violation of forum rules. If you download the file, and bring it to a friends PC, and do that process, then, you will have the model.
This may be another option, but I have not tried it.
http://www.fanhow.com/knowhow:Online_Convert_.Doc_to_.Pdf_with_Google_Docs_82074829
In the old days, you had VirtualPC. This was when PowerPC was the processor of choice for Macs. Worked, but slooww (had to emulate the x86 processor as well as run the operating system).But truthfully I have heard of a program out there that will emulate a PC on a Mac but don't ask me what it is, sorry.
There is a program call WINE that is supposed to run some Windows programs on a MAC without having to install the whole Windows program but I haven't had time to try it yet. You should be able to find it with a quick Google search.
Clif
PS: If you don't run a MAC please quit bashing them. Most graphic designers and artists do run MACs.
It would be "inclusive", if model makers would offer .PDF versions of their .PDO models. You will lose the instructional aspect. A few designers have told me they worry people will say their models aren't buildable because they won't have the inherit instructions that come with .PDO files. This is a genuine concern. I think that .PDO's are established enough that Apple should offer a solution. I wonder if any Mac users have voiced this concern with Apple? It's kind of ridiculous. If Adobe Photoshop can run on Mac's, I am sure it would not be hard for someone to come up with a solution. Tamasoft does not seem to have the motivation or care. It seems to me the ball is in both Apple's court, and Tamasoft's too, their both at fault.