I am moving this here from the general Avast Free etc. forum, since I am on OS X (but I didn't notice the separate forum for OS X before).
I am trying to install Avast, but the installer gives me a message that I can't install due to the presence of Sophos antivirus.
I tried to remove all traces that I can find of an old Sophos install long ago uninstalled, but I still get the message.
I do not remember how I ended up with an incomplete uninstall, about 18 months ago. I probably just naively tried to uninstall Sophos by deleting the app, and then flailed around removing things when that didn't work well.
When Avast refused to install today, I found and ran at the shell the local Sophos uninstaller utility, still installed on my machine. It didn't complain, and ended by removing itself.
When that didn't work, I searched around in the shell and removed a variety of remaining configuration files and log directories.
When that didn't work, I posted here (in the general Sophos Free etc. forum), and as suggested there by Eddy (thank you!), used the generic uninstaller posted by Sophos at
https://community.sophos.com/kb/en-us/121206. It ran, very quickly, and said the uninstall was successful.
However, I still receive the message when installing Avast - that Sophos antivirus was detected.
Is there any list of what the Avast installer checks to determine the presence of Sophos on OS X? I am stumped right now.
Thanks!