Recently, I've been reading a well-circulated argument that OS X doesn't have any viruses because Macs have too small a market-share and nobody would bother etc. Sounds like MS FUD to me... In fact, I read one idle boast on these forums a couple of days ago (I'm not going to embarrass the poster) that they could easily produce one tomorrow if they wanted. Earlier today, on another site, I read a counter argument that went something that went like this... OS X is a highly desirable target for virus writers because: There are tons of viruses out there for Windows. Write one and your name is just one more of many... Write a successful OSX virus and you'd be the first. Your name would be top of that list and you'd make computing history. I also read that OS X's structure/design is such that viruses wouldn't gain a foothold because of the accounts/root etc. setup... So, honestly, what's the truth here?