"According to Gartner and IDC, Apple now has between 7.8 and 8.5% of market share. While those numbers are not astonishing, they are not insignificant, and their growth does not seem to be slowing down.While Mac has a better security architecture, some of the reason that there isn't so much malware targeting it is that there aren't nearly as many Macs as PCs. Combine easier attacks with more targets, and Windows becomes an irresistable magnet for Bad Guys.
So what happens if Macintosh market share doubles? Does that installed base attract criminalized malware? We may get a chance to see.
In the meantime, let's be careful out there.