This is the same in all versions of Mac OS X with Gatekeeper support, including MacOS Mojave, MacOS High Sierra, macOS Sierra, El Capitan, OS X Yosemite 10.10.x, OS X Mavericks, 10.9.x, and Mountain Lion 10.8.x, where the feature was first introduced. * Newer versions of macOS can allow apps from anywhere with these instructions if the option is not immediately available You can now launch any app from any location or developer.Look for “Allow applications downloaded from:” and choose “Anywhere” *.Choose “Security & Privacy” and then click the “General” tab, followed by clicking the lock icon in the corner to unlock the settings.Launch System Preferences from the Apple  menu.This is generally best for advanced users who know what apps to trust and not to trust: Disable GateKeeper’s Unidentified App Developer Prevention Completely If you get tired of constantly right-clicking apps to open them, return to pre-Mountain Lion levels of app security by turning off Gatekeepers app verification completely. You can do this with any third party app that gives you this warning dialog and open it anyway. Click the “Open” button at the next dialog warning to launch the app anyway.Right-click (or control-click) the application in question and choose “Open”.Temporarily bypassing Gatekeeper to skirt around the “unidentified developer” error message is probably the best option for most Mac users, since it maintains some security systemwide and instead simply allows the specific app to open: How to Temporarily Get Around “App Can’t Be Opened” Gatekeeper Alert Message on Mac This security feature is called GateKeeper, and it doesn’t mean you can’t run those unverified apps on the Mac, you just have to either temporarily skirt the security blanket of GateKeeper, or turn off the app limitations entirely.

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