My business runs all Mac... have 3 Mac servers, a big database running on one, and a bunch of other "stuff" needed for "business"... and all the desktop (Macs) work well together. We also have two PC's (blec). The local plastic surgery center here is also all Mac. Mac is not a "footnote." That sounds like something someone said in 1989. The OS is now basically UNIX with a nice GUI sitting on top of it so most of the stuff is actually open source/GNU based and has been around for eons (i.e. Sun, HP, etc.). Although not immune from malware, the underlying security model of UNIX is much more robust than Microsoft crap... and the financial industry is getting their clock cleaned right now because of this. Also, on our website, about 23% of the "hits" are Mac OS... and I doubt we attract "art types" in what we do.