Wow - just read a quick article on MacBytes about how Apple is facing increasing cyber threats, as predicted by McAfee. What a puff piece. Read it here if you want.
How do you take a statement from a company that is in the market to sell you the antidote and make it a factual article? Sounds like a sponsored article. We all know how ugly and time consuming a virus/spyware on the PC is. I have been using Mac OS X since day one - I was actually a beta tester for Apple before the release. The only 'exploit' on the MAC ever developed in that time was through SAFARI when you 'automatically open safe files after downloading' and a malicious file from the Internet could deliver a payload - but not a virus - not a spyware yet, have a I seen. That is about 10 years of Mac OS X.
While I do not doubt that as the Mac gains more shares, it will become the target of maliciousness, it just isn't the case now and these companies are trying to create a market share, where none exists. They are scaring you into believing you need something on your computer, that there is no reason to have.
That is akin to having an insurance company sell you an extended policy on your car to cover the propellors and landing gear.... Hmmm... There isn't any on my car - are you sure I need it? Now ask yourself... are you sure you need anything for the Mac, just yet? Wait until something strikes - keep your money in your pocket and make sure your Mac uses TIME MACHINE.
That is the best advice you are going to get for 2011 and your Mac!