An unknown developer is an alternative and fast way to allow macOS to open a program. First of all, you have to find the app's file in your Finder and right-click it. In the drop-down menu, click on the first option: 'Open'. By doing so, you can still open the program despite the restrictions of MacOS.
How To Install Unidentified Developer Apps - Easy PC Tutorials An unidentified developer isn’t necessarily a bad thing. It just means that the person who wrote the app is not registered in Apple’s Developer program. Typically someone who wanted to write apps for Apple would register as a developer. When they do this, they get a personal certificate that they can use to sign their apps that they design How to Open Apps from Unidentified Developers in macOS Sierra Oct 20, 2016
Mac OS X - Install Programs from Unidentified Developers
How to Open Apps from Unidentified Developers in macOS May 10, 2017 How to Open Applications From Unidentified Developers in
Jul 24, 2017
Control-click the app icon, then choose Open from the shortcut menu. Click Open.The app is saved as an exception to your security settings, and you can open it in the future by double-clicking it just as you can any registered app. Mac OS X - Install Programs from Unidentified Developers Aug 02, 2012 open app from unidentified developer -- A… - Apple Community Dec 17, 2017