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Sophos - Installation Instructions for MacOS

Starting July of 2021, IS&T has migrated to a new version of Sophos called Sophos Central. MIT users have until the summer of 2022 before the old version will stop receiving updates. This page references the legacy version of Sophos. You can see documentation for the new Sophos Central here and download the newest version of Sophos here.

On this page:


NOTE: Please check OS compatibility by clicking here prior to installation.

You must be logged in with administrator rights to install Sophos AntiVirus.


You may see cosmetic differences in the install process depending on what version you're using.

  1. Download the Sophos installer from the Software Grid (certificates required).
  2. Double-click the download named
  3. Accept the defaults


Unapproved Caller. Security Agent may only be invoked by Apple software.

This error is usually caused by a computer that is preparing to/needs to be rebooted before the software can be installed. Try rebooting and running the installer again.

Normal operation

When installation is finished, Sophos will check for updates. You can see a shield icon in the menubar with an animated arrow indicating that Sophos is downloading updates:

When Sophos is fully updated, the menu-bar icon showing that Sophos is protecting your system is a shield with an "S" inside:

Can it be uninstalled?

Sophos Anti-Virus comes with an uninstaller in case you want to remove it (we hope that you won’t). Simply run the Remove Sophos installer in /Library/Sophos Anti-Virus/ .

Where can I get more information?

Look in the Help menu for Sophos Anti-Virus for Mac help. Click here to learn more about Sophos Anti-Virus.

See Also

IS&T Contributions

Documentation and information provided by IS&T staff members

Last Modified:

June 16, 2021

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