How to Allow Apps from Anywhere in macOS Gatekeeper
- Quit out of System Preferences
- Open the Terminal app from the /Applications/Utilities/ folder and then enter the following command syntax:
sudo spctl --master-disable
- Hit return and authenticate with an admin password
- Relaunch System Preferences and go to “Security & Privacy” and the “General” tab. You will now see the "Anywhere" option under "Allow apps downloaded from:".