Disable the Startup Sound

To permanently mute the startup sound, open the terminal and type: sudo nvram SystemAudioVolume=%80 sudo nvram SystemAudioVolume=%01 sudo nvram SystemAudioVolume=%00 sudo nvram SystemAudioVolume=” “ Its depending on some models. To restore the startup chime, type: sudo nvram -d SystemAudioVolume To temporarily disable the startup sound, just press the “Mute” button on your keyboard (that’s the(…)

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