How to disable Startup Chime?

for some reason apple removed the chime in catalina. you should be able to reactivate and/or deactivate the chime with terminal commands.

to enable it, open terminal (found in applications > utilities) and paste in this command

sudo nvram StartupMute=%00

and enter your password when asked.

then restart your mac to test. if that didn't work, you can try disabling it before re-enabling it. to disable it, paste in this command in terminal.

sudo nvram StartupMute=%01

again enter your password when asked.

keonedrew wrote:

What should I do to disable the sound chime at startup?

sorry, most people ask how to turn it on. just use the second terminal command for disabling it shown in my previous post

If terminal does not work all you can do is turn the sound down when shutting down so you will not hear it at next boot up..

you're welcome. i'm always happy to help. :)