AppKed

macOS Mojave Gatekeeper

The most common messages received from users on Appked 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

Turn off SIP

Click the  symbol in the Menu bar.
Click Restart…
Hold down Command-R to reboot into Recovery Mode.
Click Utilities.
Select Terminal.
Type csrutil disable.
Press Return or Enter on your keyboard.
Click the  symbol in the Menu bar.
Click Restart…