There's a black hat hacking conference/competition every year and I believe for the past two years the Mac computer was the first to get hacked into of all the various OS's. I still wouldn't worry much if I was a Mac user because most of these exploits don't make it into the wild, since there are so few Mac's and it's just not worth it for hackers, but if their population grew I would be worried since Apple seems to takes forever to release patches to major security flaws. I would also be worried if I was an iPhone user. I read yesterday there's a flaw in them that would let you control other iPhones and potentially take out cellular transmission towers with them. Crazy stuff.
