Only if you visit a certain pr0n site and are stupid enough to believe you can install (or even have to) ActiveX on your Mac.

New Mac Trojan masquerades as video codec

I just ran across that today, but not from clicking a porn link. I was looking up stuff about that wacko that shot up the museum, he had a "holy western empire" website. One of the links on Google was fake, and automatically downloaded a movie.dmg to my computer. Of course I don't have automatically open files set but if one did it would have mounted the image and brought up the Finder window with the installer.

I tried it again outof curiousity, and the ActiveX window then came up.

The link no longer downloads the dmg file, but it automatically now downloads a holywesternempire.exe file.

It was a link from this site, (I removed the rest of the url.) www.zebrapleco.com/removed

So it's now on multiple sites. I don't auto open downloads either and I don't trust things that download without asking me first. I suppose there are still folks out there who just dl and install everything that's presented to them.