I bought my first Mac in 30 years. (technically, my previous Apple computer was the Apple II back in 1983?) I have not touched or looked at a Mac in 30 years, so I have absolutely no idea what it does or how to use it. Not yet anyway. My MBA is arriving next week. In case anyone is wondering, I escaped from Windows after 30 years because Windows 8 finally broke the camel's back. I was happy as a clam until I started using Windows 8 earlier this year. It has cost me hours of pain and suffering and anger towards Microsoft. I was chatting with the Apple Store Genius guy waiting for another employee to complete my purchase, he told me that I should buy anti-virus software once I start using my new MBA. He suggested Norton Anti-Virus or Internet Security. He said criminals didn't target Macs, but random people could. (i.e. bored college kids doing it just to see if it could be done) Call me confused, but i was under the impression that Macs do NOT need any anti-virus software?