Let me warn you, it is going to be tougher than on a PC, for a couple of reasons- Macs like to associate files with the program that saved them, so if you use a text editor to make a tiny change on a CR2 the Mac is going to think it is a Simple Text file, not a Poser one, the other problem is a lot of the nice little free utilities we all know and love and use are PC only. There are work arounds for both, it could be done, but it is sort of easier to get a cheap (and they are cheap!) PC. To work on the actual mesh you need to save or convert to OBJ format, I don't remember Strata being able to do that, never used the others.