How to disable macOS Gatekeeper and Allow Apps downloaded from: Anywhere
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:
sudo spctl --master-disableHit return and authenticate with an admin password
This will allow you to open and run apps from “Anywhere” outside the Mac App Store.
To re-enable Gatekeeper simply run the following command in the Terminal app
sudo spctl --master-enable