How to fix damaged app message on macOS Sierra
To resolute Gatekeeper issues on macOS Sierra and unlock images and programs ( annoying image/application is damaged messages pretending you cannot open things ).
For that reason you might have to completely disable Gatekeeper checks, and to do that open your terminal and type:
sudo spctl --master-disable
Your mac password will be required.
Simply download the following file ( Turn-GateKeeper-off.dmg ) >> open it and follow the steps inside:
To turn on Gatekeeper ( return to its default status ) download the following file and follow the steps inside:
NMac Ked Team