I've been thinking this through. There are tens of millions of mac users out there, why no produce a virus that infects them? People say that it's not worth it because we only have about 6.5 percent market-share. But really, if a hacker could infect HALF of that, I'm sure the hacker would be very proud. And c'mon, the person who creates the first mac virus would be ridiculously famous. So why not?