John Norstad retired Disinfectant on 6 May, 1998. GateKeeper by Chris Johnson GateKeeper was a control panel which did continuous background scanning for suspicious activity and removed viruses on the fly. It was the first Macintosh anti-virus program to automatically detect and prevent known and unknown viruses from acting. Vaccine by Don Brown, CE Software Vaccine was a control panel distributed free in 1988 and never updated. I will not fuel this spiral.
Some people still fail to see the harm in spreading viruses.
I think they're wrong. The whole thrust of the personal computer has been bringing control of the computer to the user. Viruses steal that control away and replace it with fear, uncertainty, and doubt. I could not mention every author who has contributed anti-virus software to the Macintosh platform. There are also descriptions of retired commercial anti-virus programs .