I am trying to change the startup sound. When I checked the setting using:
sudo nvram -p
it returns a setting for SystemAudioVolume DB %ee
I entered:
sudo nvram SystemAudioVolume=%00
When I check again using sudo nvram -p
both names show up in the list:
SystemAudioVolume DB …. %ee
SystemAudioVolume …. %00 (it took my setting but doesn't kill sound)
Should I be trying to set SystemAudioVolume DB instead?
If yes, is this the right way?
sudo nvram SystemAudioVolumeDB=%aa
(No space before DB.) Does anyone know the proper range for this?
My computer is old but I don't want to break it.
Best Answer
Firstly, the
sudo nvram SystemAudioVolume=%00
(or the same command with different values at end) never allowed users to actually change the startup chime sound. In earlier versions of Mac OS X it did allow users to change the volume, and therefore they could mute the startup chime, but this did not change the sound.The closest thing to changing the sound is a hack that allowed users to mute the startup chime and then add another sound that occurred upon logging in to your user account - but of course this is not a startup sound, just a sound that plays when you log into your user account.
As for whether
SystemAudioVolume
has been replaced withSystemAudioVolumeDB
, the answer is no. In fact, as you have seen from runningsudo nvram -p
, these two parameters have totally different values.Summary
SystemAudioVolume
has not been replaced bySystemAudioVolume DB
in El CapitanSystemAudioVolume
has never been used to change the startup chime sound - only to change the volume levelFurther reading
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