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disable start up sound

On Leopard I could simply put down the volume before a shut down, and I had no anoying start up sound.However this seems not to work anymore on Lion.Which possibilities do I have to start my system without the roaring bong?

iMac, Mac OS X (10.7), respond to maximilianewert@yahoo.fr

Posted on Jul 24, 2011 8:49 PM

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171 replies

Sep 28, 2014 4:40 AM in response to maximilian Jehuda Izchak

The simplest solution:


Go to Applications>Utilities>Terminal and type (or copy/paste) the next line to change the startup sound volume:


sudo nvram SystemAudioVolume=%10


(“%10” is the volume…you can use %00-%100)


To restore it to the original value type:


sudo nvram -d SystemAudioVolume


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If that doesn't work try resetting the NVRAM / PRAM first.

That's how I did.

(iMac 27-inch, Late 2009)

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Reset the NVRAM / PRAM.


http://support.apple.com/kb/PH14222?viewlocale=en_US

disable start up sound

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