Intego VirusBarrier running on iMac’s iMac has detected the following malware:

Type: Malware
Name: heuristic/HEUR/Suspar.Ge
Infected file: /Users/Shared/GOG.com/Galaxy/autoupdate/desktop-galaxy-client/Contents/Resources/web/desktopNotification s.js.zip

Action taken: The file has been added to the quarantine.

To see more information or take action on the malware infected file go to iMac’s iMac and run VirusBarrier.

Select the “Quarantine” tab in the main VirusBarrier window to view the infected file if it has been quarantined.

Choose Window > Logs to view more information about the VirusBarrier’s activity.

What do I do about this?

As far as I can tell, that appears to be a GOG Galaxy autoupdate staging area (based on the fact that in my equivalent GOG.com folder on Windows, I only have an autoupdate-verified folder, and it's empty, since I have the latest update)

You can
Report a VirusBarrier false positive.
Report the issue to GOG by clicking the cog wheel in the top right corner of GOG Galaxy and selecting Report issue.