Walt Mossberg's Mailbox: Are Macs More Secure? - WSJ.com

The abstinence method for Mac malware control -- e.g., just don't download anything except from the Apple Mac app store...

"So, my take on this is that while Mac users must be careful where they surf, and Apple will have to step up its game against these attacks, an unprotected Macintosh is still, in daily use, far less likely to become infected than an unprotected Windows PC. How users handle this depends on their habits and their tolerance, both for risk, and for the downsides of constantly running security software, which can sap resources and be annoying. I advise all Windows users to run such software. But I see it as optional for Mac users, at least today. Time will tell if that changes."

Walt Mossberg's Mailbox: Are Macs More Secure? - WSJ.com