Thanx for the heads up!
Have not run into this issue yet with my new MacBook Pro. Thanks very much for your advance warning of a potential problem.
You don't need any kind of anti-virus software. It's a waste of money and system resources.
You can very comfortably assume complete immunity from malware provided you only give your system password to programs you know and want to install.
No, you aren't technically immune to malware with a Mac, but all these windows geeks are telling you to get what amounts to “lightning bolt insurance” to justify they've been flying cheap-a$$ windows kites in the rain.