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Question: Q: How to reverse: sudo nvram SystemAudioVolume ...
https://discussions.apple.com/thread/6741774
This was the terminal command I entered: sudo nvram SystemAudioVolume=%80. Now my Facetime audio output won't work. All other system audio seems fine. How do I reverse this command? I can deal with the startup chime, but I need people to hear me on Facetime. Thanks for any help in advance. Steve
How to Disable the Boot Sound (or “Startup Chime”) on a …
https://www.howtogeek.com/260693/how-to-disable-the-boot-sound-or-startup-chime-on-a-mac/
To do this, open a Terminal window. Press Command + Space to open Spotlight search, type Terminal, and press Enter. Or, you can open a Finder window and head to Applications > Utilities > Terminal. Run the following command in the terminal window: sudo nvram SystemAudioVolume=%80 Enter your password when prompted and press Enter.
macos - How to permanently disable the Mac startup sound ...
https://apple.stackexchange.com/questions/431910/how-to-permanently-disable-the-mac-startup-sound
I tried any of the following commands: sudo nvram SystemAudioVolume=%80 sudo nvram SystemAudioVolume=%01 sudo nvram SystemAudioVolume=%00 sudo nvram SystemAudioVolume=” “. After each command, I did a shutdown of the Mac, and started it up again (no reboot). In all 4 cases, the startup sound was still played after I turned on the Mac.
How to disable the startup sound for a Mac | Dz Techs
https://www.dz-techs.com/en/disable-macs-startup-sound
To do this, just follow the steps below. 1. You have to launch Terminal. This can be done either using Spotlight or by going to “/Applications/Utilities/.” 2. Once you become a station Port Ready, just enter the command to disable the boot beep and press Enter: sudo nvram SystemAudioVolume=%80
How to Disable the Mac Boot Chime Completely - OS X Daily
https://osxdaily.com/2012/11/04/disable-mac-boot-chime/
Disabling the Mac Boot Chime Sound Launch Terminal, found in /Applications/Utilities/, then enter the following command to disable the boot chime: sudo nvram SystemAudioVolume=%80 Enter the admin password when requested, which is required by usage of the sudo command. On your next reboot the Mac will be completely silent.
Mac startup chime: How to make it work or ... - Cult of Mac
https://www.cultofmac.com/686749/how-to-resurrect-your-macs-startup-chime/
However, if you want to take drastic action and mute the chime permanently, you can do that, too. Open Terminal and type this command: sudo nvram SystemAudioVolume=%80 As before, you’ll need to...
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