Agax is an expandable free Mac antivirus program. It offers both standard virus-scanning facilities and more advanced background protection - so you don't get infected in the first place.
Version 1.3.2 is only a maintenance update. The main changes are that the Defender Log is limited in size, and Agax works under System 7 on a 68000 Mac. There are also a number of cosmetic improvements to answer questions I am frequently asked. In particular, the message reporting files that cannot be opened is less alarming. No new antivirus features have been added.
Mac OS 8.1 or later