How to fix damaged App message on MacOS Sierra

Most of new to Mac users don’t know about this and always ask what to do, the message above or the damaged app message appears when your are trying to install App or Game from outside the AppStore.

To resolve 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.


You can now download any App or Game from and run it without any problem.

For Mac OS X 10.10 or 10.11
you can see this Post

How to fix damaged App Security message on Mac OSX

For Mac OS X 10.11 or later Read this.

Download Mac OS X Apps For Free

Dmac Apps team

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