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andreberg/macos_disable_startup_sound_catalina.zsh

Last active June 7, 2021 11:55
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[Disable macOS Startup Sound] Disable startup chime without muting Volume (pre Big Sur) #macos #terminal #nvram #sounds #disable #catalina
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macos_disable_startup_sound_catalina.zsh
sudo nvram SystemAudioVolume=%80
# If the above command doesn’t work for your particular Mac,
# then try repeating the above steps, but replace the Terminal
# command with one of the following:
sudo nvram SystemAudioVolume=%01
sudo nvram SystemAudioVolume=%00
sudo nvram SystemAudioVolume=" "
# to re-enable:
sudo nvram -d SystemAudioVolume
# For more info, see https://www.chriswrites.com/how-to-permanently-turn-off-your-macs-startup-sound/
# on Catalina you can also try:
sudo nvram StartupMute=%01
# see https://discussions.apple.com/thread/252294419
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