Gatekeeper by default will only open apps purchased and downloaded from the Mac App Store or programs from developers that were furnished with Developer IDs from Apple.
The EnGenius Zone Controller (EZC) does not have this digital signature. As such, Gatekeeper will need to be disabled and set to allow installation of software downloaded from “Anywhere”.
Click on the Apple icon and select System Preferences.
Go to Security & Privacy and click on the General tab.
Select “Anywhere” option under the “Allow applications downloaded from”.
Note: Usually, you will only need to disable Gatekeeper to install and initially run the EZC.