Mac App Can't Be Opened Because Unidentified Developer [Fix]

Can't be opened because it is from an unidentified developer (often from a newly downloaded app from the internet).  Only OK shows in the pop-up and there is no way to Open.


1.  Applications folder

2.  Right Click on App

3.  Open

4.  Pop-up now shows "Open" button.  Click "Open" to use the app.