Apple Computer recommends that you “Run an antivirus program if you find any suspicious files or applications, or if you notice any suspicious behavior on your computer.”
And Apple further suggests,
“It is also advisable to use antivirus software to scan any files before installation. A selection of third-party products may be found at the Macintosh Products Guide.”
But if you access the Mac Products Guide as suggested above by Apple, and search for antivirus, absolutely no products are listed. So, even though Apple recommends using antivirus software, you are on your own finding any such software that is compatible.
While it is true MACs have various built-in security features, Apple does not guarantee they are immune from successful malicious software attacks.
As MACs increase their market share, criminals will be more inclined to turn their attention to Apple brand computers as evidenced by more frequent MAC malware infections being reported.
If you agree with Apple that you should run antivirus software, here are some options for free MAC antivirus software to get you started if you are looking for options: