I won't pretend to be the #1 mac guru, but virus barrier has always been a good program for mac users when it comes to antivirus. I have 4 macs myself and I don't install virus protection. I really don't think it's needed that much yet. When it is, I'm sure apple will provide an application for free to solve the problem. They're not like MS and just say "Oh well. You bought this $1,000 computer. Have a great life and try not to get viruses!"