Allowing Avast Software extensions on macOS 10.13 and later

macOS versions 10.13 and later require user approval before loading new, third-party kernel extensions. Avast One, Avast Security, Avast Premium Security, and Avast Omni use kernel extensions for the real-time protection features. To ensure that your Avast product can fully protect your system, you need to manually allow Avast Software extensions.

Allow Avast Software extensions

After installing or updating Avast One, Avast Security, Avast Premium Security, or Avast Omni, you may see the status message This Mac is not fully protected. This is because the Core Shields are disabled due to the Avast Software extensions being blocked by your macOS. Follow the gif or steps below to allow Avast Software extensions:

  1. Click the Apple icon in the menu bar and select System Preferences. Then double-click Security & Privacy.
  2. Ensure the General tab is selected.
  3. If your settings are locked, click the lock icon, then enter the password that you use when you start your Mac, and click Unlock.
  4. Click Allow.

Avast Software extensions are now allowed. You can close the Security & Privacy preferences window.


If the Allow button does not work, refer to the following video for further instructions on how to allow Avast Software extensions:

  • Avast One 21.x for Mac
  • Avast Omni 21.x for Mac
  • Avast Premium Security 14.x for Mac or later
  • Avast Security 12.9 for Mac or later
  • Apple macOS 10.15.x (Catalina)
  • Apple macOS 10.14.x (Mojave)
  • Apple macOS 10.13.x (High Sierra)

Was this article helpful?

Need additional help?

Contact us