I just purchased my first Mac computer (Newest generation Imac 5k Retina) and would like recommendations on what type of virus protection I should use. I have been working in IT for 20+ years and have always had Windows computers that needed virus protection (typically McAfee or Norton). The new Mac will be used primarily as a home computer (office, email, web surfing) for my wife. This will be her first experience with a Mac computer. We have the option of using Norton for free via Comcast but the current version slows my older windows computer almost to a halt. There are many free options like Avira and Avast as well as some paid versions. I'm more concerned with virus and phishing protection; also one that doesn't have too much impact on performance and automatically downloads pattern files, etc. and is easy to use. I know there are many threads on the subject but I'd appreciate what the current thinking is. Thanks in advance!