No startup / boot chime; how to bring it back? I'm one of the lucky (?) guys who managed to get a new MacBook Pro 2016 (the version that introduced the Touch Bar).

This MBP model does not have a boot chime by default.  

There are documented ways to enable it, specifically going to Terminal.app and typing in:

sudo nvram BootAudio=%01

Unfortunately for me, this fix does not work on my own machine. Other people have noticed this as well.  My guess is that it's a firmware fix or enhancement that got rid of BootAudio as an option.

Does anyone know a different option to re-enable the startup chime?
Consider trying this out:


Launch Terminal.app and type the following command:

sudo nvram StartupMute=%00
If prompted enter the admin password.
Quit the Terminal app..
Make sure the volume is up before you restart your Mac.
Restart your Mac.


You should hear a F-sharp chord sound when your Mac boots up.

If you wish to disable it, follow the same steps as above and type the following command instead:

sudo nvram StartupMute=%01

Tested on a 16" 2019 MacBook Pro running macOS Catalina 10.15.3