“App is Damaged Can’t Be Opened” Error Message in mac OS Sierra is a common error when you try to install a non-AppStore app. See this tips to fix fix it easily:
1. Open a Terminal with appropriate privileges (“sudo bash” to make you root on most systems)
2. Enter the following, substituting “AppName” with the real name of the app:
xattr -cr /Applications/AppName.app
3. Press Enter to run the command.
Your name of Apps shouldn’t have Space character. Exp: Cleanmymac 3 -> Cleanmymac3
This should remove the flag currently set on the app.
Here is a related tip for macOS Sierra. The option to allow apps from anywhere has been removed. Well, hidden actually.
GFA Team / Internet