macOS Mojave Gatekeeper

The most common messages received from users on Macosupdate are reports that the “app” is damaged and can’t be opened. You should move it to the Trash! Like this:

Fix damaged app Message macOS High Sierra



It a simple fix and here is how we fix it:

Open the Terminal app from the /Applications/Utilities/ folder and then enter the following command syntax:

Option I
For a certain application run in Terminal:
sudo xattr -rd com.apple.quarantine /Applications/LockedApp.app

Option II
To disable checks globally run in Terminal:
sudo spctl --master-disable

Fix damaged app Message macOS High Sierra

This will allow you to open and run apps from “Anywhere” outside the Mac App Store.

Fix damaged app Message macOS High Sierra



To re-enable Gatekeeper simply run the following command in the Terminal app

sudo spctl --master-enable