How do I allow all apps to run in Sierra and later?

[Hervé]

macOS Sierra and later do not allow all apps to run by default. Instead, the OS limits execution to apps downloaded from AppStore or AppStore & identified developers.

 

As such, some downloaded apps cannot be executed without triggering a warning and users may have to go to the Security & Privacy PrefPane to allow the app to run.

 

To change his and allow execution of all downloaded apps by default, type the following Terminal command:

sudo spctl  --master-disable

The restriction will then be lifted and all downloaded apps will be allowed to run.

 

I believe this info was 1st reported by Netkas.