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How to permanently turn off your Mac’s startup sound ...
https://www.chriswrites.com/how-to-permanently-turn-off-your-macs-startup-sound/#:~:text=Open%20a%20new%20Finder%20window.%20Navigate%20to%20%E2%80%98Applications,password%20when%20prompted%2C%20and%20then%20press%20%E2%80%98Enter%E2%80%99%20again.
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.
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.
sudo nvram SystemAudioVolume=%80不管用怎么办_wwwwws的 …
https://blog.csdn.net/wwwwws/article/details/114224900
打开终端： （1）关闭 sudo nvram SystemAudioVolume=%80 （2）恢复 sudo nvram -d SystemAudioVolume MacBook 启动／禁 用 翻盖自动开关机 开往春天的地铁 2万+ 从 2016 新款 MacBook Pro 起，预设打开笔电上盖或连接电源供应器时，电脑就会自动开机而且开机时没有启动声，本文教你如何将这些东西调整回原本的样子。 以下指令都是通过「应 用 程序 …
sudo nvram SystemAudioVolume=%00 sudo nvram -d ...
https://pastebin.com/vZLu0xKh
Jul 12th, 2014. 306. Never. Not a member of Pastebin yet? Sign Up , it unlocks many cool features! text 0.07 KB. raw download clone embed print report. sudo nvram SystemAudioVolume=%00. sudo nvram -d SystemAudioVolume.
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/
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. Restart your Mac and you won’t hear the sound.
SystemAudioVolume not working in Yosemite · Issue …
https://github.com/mathiasbynens/dotfiles/issues/517
doing sudo nvram SystemAudioVolumeDB="<option_here>", where <option_here> are the values used in point above, returns success, I can verify it by running sudo nvram -p | grep SystemAudioVolume Setting both SystemAudioVolume and SystemAudioVolumeDB with any of the value does not mute the chime
macos - How to permanently disable the Mac startup sound ...
https://apple.stackexchange.com/questions/431910/how-to-permanently-disable-the-mac-startup-sound
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.
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