In terminal the following command will disable the booting sound on Macintosh:
sudo nvram SystemAudioVolume=%80
To go back to original(default) setting:
sudo nvram -d SystemAudioVolume
In terminal the following command will disable the booting sound on Macintosh:
sudo nvram SystemAudioVolume=%80
To go back to original(default) setting:
sudo nvram -d SystemAudioVolume