Open Firmware: Reduce Startup Chime Sound

[whoisthisguy]

Hi all! I have a problem with my Mac Mini - the chime sound is too lound and I cannot fix that by changing the volume in OSX. After restart the chimes volume remains the same. Maybe someone had an experience adjusting chime volume via Open Firmware? Thanks!

[darthnVader]

Wait till you here the broken glass sound.......

.....Too far.

[whoisthisguy]

Wait till you here the broken glass sound.......

Nooo ) Im about the startup machine chime sound. I've heard that OSX volume affects the startup Chime sound volume. But not in my case with Mac Mini G4. Just want to mute this sound somehow because my wife is waking up at night because of it )

[Jacques]

Necro post, but I had the same question. (and this is what turned up with search)

For future reference, this article covers how to silence the boot chime.

https://www.howtogeek.com/260693/how-to-disable-the-boot-sound-or-startup-chime-on-a-mac/

in summary, from an OS X terminal (I suspect from a terminal launched via a installer image would also work)...

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sudo nvram SystemAudioVolume=%80or

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sudo nvram SystemAudioVolume=%01or

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sudo nvram SystemAudioVolume=%00or

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sudo nvram SystemAudioVolume=" "
To revert

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sudo nvram -d SystemAudioVolume
%80 worked for my mac mini.

I would love to be able to adjust it to say 20% of the full volume. Setting the volume for internal speaker in OSX doesn't work 0n 10.4.11

[IIO]

for MacOS9 there is a controlpanel which does that. i´ve never looked but i guess there should be one for OSX as well.

[Jacques]

I cannot adjust the volume on the Mac Mini, it's stuck and I believe it's a limitation with the hacked Mini OS9 install.

[IIO]

while it is correct that since OSX 10.1 the system volume would affect the startup sound volume, i am sure there could be another solution - because in OS9 there is.

however, startup sound mute doesnt work in my minis, and i am not able to tell if that is because of the hardware (not all machines support its method) or if that is releated to the miniOS boot process.(?)