text: Not just less prone, nearly impervious.  Even viruses designed for OSX (not that I know of any) have trouble executing just because of the robustness and security layers in the operating system itself, it might make it run slower but as far as wreaking havoc on a Mac, it's nearly impossible.  Spam has to do with email so there isn't much you can do there, that has nothing to do with the Operating system.  Also, there is little to no adware/spyware on the Mac, again because it is harder to execute on OSX and because the user base is so low for the Mac OSX platform.\n\nAnd your last part...if so, what?