I've been perusing many anti-virus rating sites and I'm still somewhat confused. I don't really use VPN, I don't need parental controls, and I want something easy to understand. Most of the websites give Bitdefender a top rating, followed by Norton. I once had a bad experience with Norton, so I still have that bad taste in my mouth. And now, a friend is asking me what anti-virus software HE should use, since his is expiring soon. Can we please review what would make a good antivirus for my Apple iMac?