Provides real time malware protection, scanning and removal. Can be configured to scan email and external storage devices when they are mounted.

Complete antivirus software suite for the Macintosh to eliminates all known viruses including system and macro viruses. Supports archive scans

Macintosh antivirus news, advisories, downloads and reviews of mac virus scanners and definitions of viruses and trojans for Mac OS and Mac OS X.

An expandable free Mac antivirus program by John Dalgliesh. It offers both standard virus-scanning facilities and more advanced background protection, so you don't get infected in the first place.

Example/Logs of Nimda virus/worm in action on Mac OS X server Samba Service.

On the encounter with an uncommon Macintosh computer virus, its symptoms and how to get rid of it.

These antivirus utilities by Ioannis Galidakis are meant to track down 68K viruses on your system. They MAY prove to be useful, if you are unable or unwilling to purchase professional commercial antivirus software, or in conjunction with such software.