How do I install Sophos antivirus for Mac?

This tutorial applies to the following operating system(s):

Apple macOS


ITS offers Sophos antivirus for University-owned machines to help protect them from viruses and malware. If your device is not university owned (personal devices for example), Sophos offers a free home edition of their antivirus software that you can use. The free edition can be downloaded from

 You must have administrative rights on the computer in order to install Sophos antivirus.

Step 1:

Download the Sophos installer from You may need to enter your University of Idaho NetID to continue.

Screenshot of the login prompt at

Step 2:

Open the Downloads folder and double click on the '' file. A folder should appear in your Downloads folder called 'SophosInstall'. Open this folder and double click on the file marked 'Sophos Installer'.

Screenshot of unzipped Sophos antivirus

Step 3:

Click Install to begin the installation process.

Screenshot of the Sophos installer welcome screen.

Step 4:

The installer downloads the installation packages and installs them. This may take a few minutes.

Screenshot of the Sophos install in progress.

Step 5:

If you see a prompt to trust software published by Sophos, click "Open Security Preferences".

Screenshot of blocked system extension from Sophos

Click 'Allow' in the window that appears to allow Sophos to install.

Security preferences screen

Step 6:

Once complete the installer should indicate the installation completed successfully.

Screenshot of the completed Sophos installation.

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