Ever since the new mac os version 10.12 (Sierra) came out. People are facing the issue of installing 3rd party apps (cracked) on it.
Apple has now disabled the feature to turn off that 3rd party check.
Previously it was under
System Preferences -> Security & Privacy -> General
as you can see there are only 2 options now.
I will teach you how to get that 3rd option in mac os 10.12 so you can install cracked apps/3rd party apps
COMMAND + Space
now type this command
sudo spctl —master-disable
it will ask for your password
type in your password and press enter
you have the 3rd option ANYWHERE
now you can install 3rd party apps on your new 10.12