Of course, they have an 8% share of the computer market; Maybe their recent popularity, outside of the computer market, makes them a target because they are so high profile. Why would you waste your time writing a virus or trojan for a tiny market share as opposed to targeting the 92% market share? Hell, I've heard a sales pitch advocating the use of the AS/400 because there has NEVER been a virus that infected the AS/400.
Only reply in this thread so far that got the point. Point being, hackers still don't give a shit about Apple, so of course there aren't any viruses. Once they do, watch out. Plunkey probably wouldn't be able to boot his Mac at all if it had a mere fraction of the shit Windows has to deal with.