03-24-2017 03:27 PM - edited 03-24-2017 03:27 PM
open terminal type : sudo spctl --master-disable
then you will be able to install Quik-MacInstaller-2.2 for desktop (running sierra 10.12.3)
Pretty poor form on gopro's part to not offer solutions on their own forum. I have been trying to find a solution for way too long.