eh.... i think he was talking about protecting the hardware (see http://store.apple.com/1-800-MY-APPLE/WebObjects/AppleStore.woa/wa/RSLID?mco=3C2BA53D&nplm=TJ547LL/A)I have you covered.
Step one: Take malware disk in dominant hand.
Step two: Throw malware disk into wall or dog's mouth (trash cans are also acceptable).
Step two (alternate): Sell to Windows user, preferably marked up.
Step three: Rest easy, as there is no chance of you being affected.
Seriously, there is purportedly some malware for Macs, but what are they and what do they affect? And why has the Mac community not raised concerns over it? Because it is virtually (no pun intended) irrelevant. Sleep soundly and browse widely, my friend.
Edit: For OS X or a Boot Camped/Paralleled Windows OS? THAT makes a difference on whether or not you're really, er... safe.