# The Mac or Windows won't let NWK open

The first time, the Mac may say it can't verify the developer and Windows may show the blue protection screen. Here's how to allow it.

> NWK Live Production · https://nwkglobal.com/help/security-warning-when-opening/ · Setor 360 Tecnologia e Eventos Ltda (CNPJ 68.185.118/0001-75)


## On Mac
The first time, the Mac may warn that it can't verify the developer of NWK.

- Close the warning.
- Open System Settings › Privacy & Security.
- Click Open Anyway.
After that, NWK opens normally from its icon.



## On Windows
If the blue Windows protected your PC screen appears:

- Click More info.
- Click Run anyway.
- Follow the installer.


## Download only from the official site
Download NWK only from nwkglobal.com. Updates done by the program itself only install versions signed by NWK.