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20 Handy Mavericks Tips & Tricks You Probably Don't Know ...
https://www.hongkiat.com/blog/mavericks-tips-tricks/#:~:text=sudo%20nvram%20SystemAudioVolume%3D%2580%20You%20can%20return%20it%20to,nvram%20-d%20SystemAudioVolume%2020.%20Access%20Hidden%20Mavericks%20Wallpapers
How to reverse: sudo nvram SystemAudioVol… - Apple Community
https://discussions.apple.com/thread/6741774
Answer: A: Run the following: sudo nvram SystemAudioVolume=%26. (118856) More Less. Posted on Dec 25, 2014 11:40 AM. View answer in context.
SystemAudioVolume not working in Yosemite #517 - …
https://github.com/mathiasbynens/dotfiles/issues/517
Running sudo nvram SystemAudioVolume=" "works as expected since the new value is reflected in sudo nvram -p. However, upon reboot, the startup chime comes to greet me as usual. ... (14D136) but it didn't work with Mavericks too. There is a less-than-perfect option to use some "auto mute" 3rd party software that would automatically mute the ...
20 Handy Mavericks Tips & Tricks You Probably Don't …
https://www.hongkiat.com/blog/mavericks-tips-tricks/
sudo nvram SystemAudioVolume=%80. You can return it to its default state by entering the following command into Terminal: sudo nvram -d SystemAudioVolume. 20. Access Hidden Mavericks Wallpapers. Once you’ve updated to Mavericks, you’ll be greeted with new default wallpapers. However, there are also more than 30 other new but hidden wallpapers that …
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.
terminal - Has Unix Parameter Name SystemAudioVolume Been ...
https://apple.stackexchange.com/questions/367502/has-unix-parameter-name-systemaudiovolume-been-changed-to-systemaudiovolume-db-i
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.
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