You may receive a message that an install "can't be opened because it is from an unidentified developer." By default, the Mac OS only allows for installation of applications that come from 'verified sources.'
If you would like to allow the application to install, you can open System Preferences > Security & Privacy > General tab. Select Open Anyway to confirm your intent to open or install the app. Please visit Safely open apps on your Mac for instructions from Apple support for your Mac OS and other options.
