MacOS FAQ

Developer cannot be verified or app is damaged

Starting from macOS 10.12, apps not from the Mac App Store are restricted.

Cause: Because the app is unsigned, you may see messages such as "developer cannot be verified" or "app is damaged." The developer needs an Apple Developer Program membership for code signing. Solution:

• Click "Cancel", then go to "System Preferences" -> "Security & Privacy".
• Click "Open Anyway", then click "Open" in the popup window.
• On newer system versions, you may not find the above options on the "Security & Privacy" page, or you may see a file-damaged warning on launch. Open Terminal and run the command below to grant permission.

sudo xattr -d com.apple.quarantine /Applications/Cxxxx.app

Apple cannot check the app for malicious software

Apple cannot check whether this app contains malicious software.

Solution:

• See the macOS User Guide and choose the document for your macOS version.