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Online Defence on Mac OS

In order for TalkTalk Online Defence to work correctly the following versions of macOS are supported;

  • macOS version 12 "Monterey
  • macOS version 11 "Big Sur"
  • macOS version 10.15 "Catalina" (10.15.5 and higher)


To check what version your Apple computer is using:

  1. At the top of your screen hover over the apple symbol
  2. Select About This Mac
  3. You'll then see a pop up window with the macOS name and version below


Real-time scanning protects your computer by scanning all files when they are accessed and by blocking access to those files that contain malware.

When you are installing F-Secure SAFE on your Mac computer, the software needs to make changes to your system to enable real-time scanning. To enable this system change, you need to allow the new system extension to load. If you fail to enable the extension, the real-time scanning feature is turned off and your computer is not fully protected.

During the installation, the< System Extension Blocked dialog is shown indicating that a program tried to load a system extension signed by F-Secure Corporation. To enable the extension:

  1. On the dialog, select Open Security Preferences. The Security & Privacy window opens.
  2. On the General tab, select Allow.

This allows F-Secure's system extension to load, and your computer is fully protected.

Note: If you didn't enable the system extension during the installation, you can still do it as soon as you have activated the product:

  1. Open SAFE and select the Enable real-time scanning for full protection link. The Allow new system extension from F-Secure dialog will open.
  2. On the dialog, select Security & Privacy. The Security & Privacy window will open.
  3. On the General tab, select Allow.

This allows F-Secure's system extension to load, and your computer is fully protected.


A pop up warning will appear with a more detailed explanation

"Allowing notifications from F-Secure SAFE is necessary to be a be aware of intercepted malicious activity, receive important product notification and more. Allow notifications by enabling F-Secure SAFE in the notification section of the system preferences app."


  1. Select Open System Preferences
  2. Select Allow Notifications
  3. You will now see the "Your computer is not fully protected" message replaced with "Your computer is protected"

Follow the steps below to uninstall F-Secure SAFE on a Mac computer. 

  1. Open Finder
  2. Select Applications
  3. Double-click the F-Secure folder. 
  4. Double-click on Uninstall F-Secure SAFE
  5. Click Uninstall and enter your Administrator credentials when asked. 

    Allow a few moments for F-Secure SAFE to be uninstalled from your Mac computer. 


  • macOS Catalina (10.15) 
  • macOS Big Sur (11.0) 

! mac OS 10.134(Mojave) is no longer supported 



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