Apple has been working to make all of their operating systems extremely secure. However, some of these security measures may be annoying unless you know what is happening behind the scenes. For example, MacOS doesn't really want you to run apps that aren't purchased from the Mac App Store.
Before the macOS Sierra, you can let apps be downloaded from the Mac App Store, identified developers and "anywhere." The last option disappeared in Sierra, which was introduced in 201
After downloading an app and moving it to the application folder, right-click it and select Open. To
After selecting Open, you receive a warning that the app is "from an unidentified developer" You I am asked for you really want to open it. If you do, click Open; If not, click Cancel. If you open it, create the macOS developer for the internal list of identified developers so you can open other apps from the same developer.
Download the app and move it to your application folder. Start the app and you'll get the same warning. However, you will only be presented with a blue "OK" button. Click on it and you will be taken to the Finder. Go to System Preferences> Security and Privacy Icon (Image)> General. On the General tab, select the option "Open anyway". The app will start and the developer will be added to the