Yep, it's true, Mac computers need antivirus too! In recent months I've seen an increasing number of browser hijackers and other malware. It's a jungle out there, and you need protection. It's not just about the best protection though. You need to consider the impact on your computer's resources when picking an antivirus or you'll be chugging along in frustration when the app is running. If you haven't already made the decision, here's a great article from Tom's Guide to help you decide what's best for you.
Tom's Guide Best Mac Antivirus Review