Disable boot sound
Boot up or restart your Mac and it’ll make the outdated “startup chime” sound. This lets you know the Mac is starting up correctly, but it isn’t appropriate if you’re booting up your Mac in a quiet location like a library, or if someone is sleeping nearby.
You can easily quite the sound on your next boot, if you know what to do. But quieting the sound permanently will require a terminal command that modifies a hidden setting.
Temporarily Disable the Startup Sound
Your Mac’s startup sound depends on volume level your Mac was set to when it shuts down. Uncertainty your Mac was set to the maximum volume level, the boot chime will be played at extreme volume. Uncertainly, if your Mac was muted, the startup chime will be silenced.
To disable the startup sound, just press the “Mute” button on your keyboard (i.e F10 key on a MacBook) before shutting down or restarting your Mac. If you always have to restart your Mac for some cause but you don’t want it making any noise.
If you don’t have a Mute key on your keyboard, you can continuously just set the volume slider to the lowest level. That completes the same thing.
Permanently Disable the Startup Sound
To permanently disable the startup sound, it isn’t played at startup, even if you have your volume level set to extreme volume when you shut down, you need to use a terminal command.
To organize this, open a Terminal window. Press Command + Space to open Spotlight search, enter Terminal, and press Enter. Or, you can open a Finder window and head to Applications -> Utilities -> Terminal.
Run the following command in the terminal window:
sudo nvram SystemAudioVolume=%80
Enter your password when motivated and press Enter. Restart your Mac and you won’t hear the sound.
If you’d like to undo your modification later and have the startup chime play usually when you boot your Mac, run the following command:
sudo nvram -d SystemAudioVolume
Help, the Command Didn’t Work!
Some people statement that the above command doesn’t perform on their Macs. Uncertainty it didn’t silence the startup chime
On your system, you may need to attempt running one of these instead of other commands. These allegedly work for some people. This may be hardware-dependent, and firm commands may only work on firm hardware.
sudo nvram SystemAudioVolume=%01
sudo nvram SystemAudioVolume=%00
sudo nvram SystemAudioVolume=” ”
(The above command states, that’s a single space character between the quotation marks.)
Numerous websites say you can silence your Mac at boot by pressing the “Mute” button on your keyboard and holding it down right next you boot the Mac up. Nevertheless, this didn’t work for us. Conceivably it only works on older versions of Mac OS X, or with older Mac hardware.
Tolerate in mind that you won’t receive the startup chime when resuming from sleep or standby mode. That’s the other good purpose to just place your Mac to sleep rather than completely shutting it down, even though everybody needs to perform a full shutdown infrequently – only for a system update.
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