Fix the “App can’t be opened because it is from an unidentified developer” problem under MacOS Sierra

“App can’t be opened because it is from an unidentified developer” is a common error you will face obviously. The another error is “App is damaged and can’t be opened”.

How to fix these errors in MacOS Sierra?

Here below is “CleanMyMac 3” can’t be opened because it is from an unidentified developer error

macos-sierra-cant-be-opened-because-it-is-from-an-unidentified-developer

From Sierra desktop, Apple  menu > System Preferences > Security & Privacy > Select “General” tab > check on “Anywhere” under  “Allow applications downloaded from”, you then can launch any app from any location or developer.

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