I'm not yet too proficient an OSX hacker, yet; but on earlier systems; I would check the resource forks of suspect files. These things are easy to spot...
I just find it amusing that PC users are drawn to Mac threads -- to the extent that their posts frequently outnumber those of the Mac folks. Sort of like the morbid folks who watch NASCAR -- hoping for a wreck....
No, its that PC users are tired of mac users lying about their systems working perfectly to try and show intellectual or class superiority -- or some such thing. And, to a lesser extent, irritation at the emotional attachment most mac users seem to have to their machines such that they get terribly defensive when anyone suggests that anything made by Apple isn't the best.
"Sort of like the morbid folks who watch NASCAR -- hoping for a wreck...."
True, but I just find it amusing how the Mac and Linux folks keep trying to say they have no problems.
Just payback for the interminable Windows bashing that goes on. In 23 years of PC using I've had two viruses. One was Melisa, which got past all the best virus scanners for the for a couple of days. Fortunately it didn't destroy anything.
The other was in a game I downloaded from CNET. Not a virus, but a package of adware. That was the worst. CNET pulled the game after a couple of days.