macOS checks the app before it opens the first time to be certain it hasn’t been modified since the developer shipped it. All the developers of apps in the Mac App Store are identified by Apple, and each app is reviewed before it’s accepted.
Select the sources from which you’ll allow software to be installed:Īpp Store: Allows apps only from the Mac App Store.
If the lock at the bottom left is locked, click it to unlock the preference pane. On your Mac, choose Apple menu > System Preferences, click Security & Privacy, then click General.
