You poor sap. You actually bought that line about "no viruses." There's plenty of security problems with Macs; you don't hear about them because only a tiny fraction of the world uses them.
Seriously, if I want to cause mayhem, would I do it to a handful of artfags or the business world?
Commodore used to say the same thing about DOS. "Only MS-DOS gets viruses!" Then a few viruses for the Amiga went through the BBSes and Commodore shut up pretty quick.