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Hi. I have a Mac OS High Sierra 10.13.6 and in the Sound panel, I don't have the option to disable the startup sound. I can't find it anywhere else in the computer's control settings. How can I turn it off? It became a huge problem with my roommate, having this sound every time I turn on my computer. Please help. Thank you.
MacBook Pro 13″, macOS 10.13
The startup sound enable/disable control is not part of macOS High Sierra.
You'll need to use these Terminal commands to do that.
This works in Catalina and I believe it also works in High Sierra and Mojave.
STARTUP CHIME ENABLE/DISABLE
To enable the startup chime:
sudo nvram StartupMute=%00
you will be asked to enter your admin password and it will not display on the screen.
To disable the startup chime:
sudo nvram StartupMute=%01
you will be asked to enter your admin password and it will not display on the screen.
The startup sound enable/disable control is not part of macOS High Sierra.
You'll need to use these Terminal commands to do that.
This works in Catalina and I believe it also works in High Sierra and Mojave.
STARTUP CHIME ENABLE/DISABLE
To enable the startup chime:
sudo nvram StartupMute=%00
you will be asked to enter your admin password and it will not display on the screen.
To disable the startup chime:
sudo nvram StartupMute=%01
you will be asked to enter your admin password and it will not display on the screen.
Disable Startup Sound
