Interesting... I have an almost morbid fascination with how this will pan out. I use and love a Mac, and I don't plan on switching to a different machine, but I'm curious as to how Cupertino will respond.
I'm betting this doesn't get much traction, and that Apple with individually prevent and manage infections through Software Update. I also doubt that the Macintosh market is big enough and easily infected enough to be significantly targeted by malware.
I imagine the type of person who would install a random "Mac Codec" on their machine isn't going to start up a VM with OS X running to test it out, first.
I'm betting this doesn't get much traction, and that Apple with individually prevent and manage infections through Software Update. I also doubt that the Macintosh market is big enough and easily infected enough to be significantly targeted by malware.
We'll see.