HOW TO: Protect your Mac
We’ve said it before and we’ll say it again: Your Mac is the safest personal computer on the 
market. Even though we’ve had a couple of scares this year, there are still almost no Mac viruses. According to research done by Sophos (a maker of antivirus software), at press time there were only four known OS X viruses, compared with roughly 80,000 on Windows.
But let’s face it—we live in a dangerous world, and not all of those dangers (especially those to your privacy) are platform-specific. Here’s how to keep your personal information out of the wrong hands—and keep your Mac out of trouble.
1. Seriously consider using antivirus software
Is antivirus software worth the money and hassle? You might decide to take your chances and bet that malware authors will never target the Mac, but seriously consider installing and running antivirus software, especially if you engage in “risky” activities—browsing a variety of Web sites, exchanging files with other people via e-mail or servers, or downloading third-party software. Macworld: Feature: Protect your Mac , Page 1