It is horrible advice to tell people that they don't need anti virus protection for a Mac if their computing exposes them to the viruses out there for macs.

It is also horrible advice to imply that there is no such thing as a Mac virus which just is not true.

Buying a Mac does not solve a virus problem. And despite what Mac trolls post there are many pc's out there that have never been infected with a virus.

Any antivirus software is the very last line of Defense. If you get to the point where you need it To protect you, you probably need to revisit your computing practices.