HOW TO: Remove System Extensions

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In some instances you may need to manually remove the System Extensions. There are two ways available:

1. Reinstall and drag extension hosting software to trash
   • Reinstall using the “Sophos Installer”
   • Drag the “/Applications/Sophos/SophosWebNetworkExtension” to the trash
   • A dialog is displayed that says
     • “The application “SophosWebNetworkExtension” is hosting
     • system extensions. These extensions will be removed if you
     • continue”
   • Click on continue
   • Authenticate as requested
   • Right click on “/Applications/Sophos/Sophos Scan” and choose “Show Package Contents”
   • Navigate to Contents/MacOS and drag “SophosScanD” to the trash
   • A dialog is displayed that says
     • “The application “SophosScanD” is hosting system extensions.
     • These extensions will be removed if you continue.”
     • Click on continue
   • Authenticate as requested
   • Run “/Applications/Sophos/Remove Sophos Endpoint”
   • Restart the Mac
2. Disable SIP, use systemextensionctl to unload the extensions, and reenable SIP
   • Disable SIP:
     • Reboot into the recovery partition by holding the command (⌘) key and (R) key down while rebooting
     • Select the volume that contains your copy of Big Sur
     • Enter credentials as requested
     • In the “Recovery” application that comes up, choose the menu item “Utilities | Terminal”
     • Enter the command: “csrutil disable”
     • Restart the Mac and log in
   • Open the Terminal application
     • Enter the command “systemextensionsctl uninstall - com.sophos.endpoint.networkextension”
     • Enter credentials to the dialog that says “systemextensionctl is trying to modify a System Extension”
     • Enter the command “uninstall - com.sophos.endpoint.scanextension”
     • Enter credentials to the dialog that says “systemextensionctl is trying to modify a System Extension”
   • Enable SIP:
     • Reboot into the recovery partition by holding the command (⌘) key and (R) key down while rebooting
     • Select the volume that contains your copy of Big Sur
     • Enter credentials as requested
     • In the “Recovery” application that comes up, choose the menu item “Utilities | Terminal”
     • Enter the command: “csrutil enable”
     • Restart the Mac

Either of these methods should remove the System Extensions from the target machine. 

If you encounter problem after following these steps - please reply below.

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[edited by: Florentino Sanchez at 8:15 PM (GMT -8) on 8 Mar 2021]