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Your rating: None Average: 5 (11 votes)
Year released:
[www].se [ftp].se [mirror].us [mirror].de
Disinfectant371.bin (346.50 KB)
MD5: c3fda98f146f8b2c272ba6f380a87816
For System 6.x - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
Disinfectant-1.2.sit_.hqx (71.46 KB)
MD5: 0583ab43da57ae0c9eed1224b8459b20
For System 6.x - Mac OS 9
This app works with: SheepShaver, Basilisk II, Mini vMac

Disinfectant was the Mac's best free antivirus software, until it was retired by its creator due to the surge of macro viruses, which he decided not to support for lack of manpower (he was the only maintainer).

Use it to scan the classic Mac programs you download, even if they're post-1997. (Then use Agax or Virex to scan for Sevendust.)

Version 3.4.1 is available as a bin-hexed StuffIt archive on the NCSA FTP Site
It is compatible with System 3.2 - System 6 according to

This is version 3.7.1, the final release. Version 1.2 is also uploaded for legacy purposes.

Architecture: 68k

[Warning]: When scanning for viruses, Disinfectant does not look inside compressed archives such as common ".sit" or ".zip" files etc.

Before running any installer or executable application or self-running documents (such as "eDoc" & "DocMaker" files) - You must extract the contents of any compressed files 1st then check their contents with Disinfectant.


MikeTomTom's picture
by MikeTomTom - 2015, December 19 - 2:55am

Thanks for the John Norstad screenshots, Laurier.

Laurier's picture
by Laurier - 2015, December 19 - 12:17am

Added more screenshots.

Balrog's picture
by Balrog - 2010, November 11 - 2:08am

Haha I have version 2.7.2 (I think) someplace Smile

MikeTomTom's picture
by MikeTomTom - 2010, November 11 - 1:44am

Disinfectant does not look inside compressed archives such as common ".sit" files. You must extract the contents of any downloads and then check them with Disinfectant before running any installer or executable application or self-running documents (such as "eDoc" & "DocMaker" files).

pagan's picture
by pagan - 2010, August 24 - 8:41am

An excellent piece of software, and one of those applications you couldn't live without, as it removed all the viruses from the games you downloaded off your dial-up connection to BBS's.

It is also a great database of all (at the time) known viruses made for Macintosh.
And if you get depressed to see how infected your computer is, Disinfectant can cheer you up by playing the "Monty Python" theme.

iMachinchilla's picture
by iMachinchilla - 2010, August 23 - 4:01pm

It's good that you uploaded Disinfectant. A StuffIt Deluxe package from here is infected!
Nice that someone bothers about old Mac's security. Smile

Retrowurst's picture
by Retrowurst - 2010, February 5 - 1:38pm

You got viruses from here? Reading this, I immediately installed Disinfectant, but it didn't find anything on my computer. Pooh! Smile

MacinTricks's picture
by MacinTricks - 2010, February 2 - 4:56pm

I LOVE this application. It does exactly what it promises. I didn't realize several applications I had were infected (probably from downloading crap from this site (no offense)). As far as Microsoft Word macro viruses, I'm not sure why one would be using such software in the first place!