Just trying to define a bet.
However, with Windows offering so many targets why waste your time on Mac? And that was my original point.
So they can claim to be the first. Hackers run on pride. Also, even though Mac is a small percentage it would give that one first virus writer a pool of over 20 million machines all to himself.
He wouldn't really have a pool of over 20 million machines. First they'd all have to be online and exposed to the Internet. You'd have to scan millions of boxes to find one susceptiple Mac box. So if I wrote an exploit against an unpatched OS X box, what are the odds I'd find 20 million available to attack? And like I said, no one would really sing his praises because the damage would be very limited and the fame gained wouldn't be worth the risk and time committed to writing the virus.
The same reason why my OS I wrote in 2001 hasn't been attacked to date. Other than a few M$ lovers saying see it was hacked, no one else would care.