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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.
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 …
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.
Mac startup chime: How to make it work or ... - Cult of Mac
https://www.cultofmac.com/686749/how-to-resurrect-your-macs-startup-chime/
If you don’t want to hear the chime, you can simply mute your computer before you restart it. However, if you want to take drastic action and mute the chime permanently, you can do that, too. Open...
Linux – Modify an efi var with efivar – iTecTec
https://itectec.com/unixlinux/linux-modify-an-efi-var-with-efivar/
sudo nvram SystemAudioVolume=%80 but nvram command is not available on Linux; there is however, another program called nvramtool. Reading the man of nvramtool it's possible to get all coreboot parameters running nvramtool -a but the output of the command is: nvramtool: coreboot table not found. coreboot does not appear to be installed on this system.
Modify an efi var with efivar - Unix & Linux Stack Exchange
https://unix.stackexchange.com/questions/536436/linux-modify-an-efi-var-with-efivar
sudo nvram SystemAudioVolume=%80 but nvram command is not available on Linux; there is however, another program called nvramtool. Reading the man of nvramtool it's possible to get all coreboot parameters running nvramtool -a but the output of the command is: nvramtool: coreboot table not found. coreboot does not appear to be installed on this system.
Disable Startup Chime in Sierra | MacRumors Forums
https://forums.macrumors.com/threads/disable-startup-chime-in-sierra.2003479/
sudo nvram SystemAudioVolume=%80 command in Sierra's terminal from the recovery partition, I get an error "command sudo not available" or the like, cannot remember exactly. Anyway the once silent...
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.. The closest thing to changing the sound is a …
How to permanently turn off your Mac’s startup sound ...
https://www.chriswrites.com/how-to-permanently-turn-off-your-macs-startup-sound/
sudo nvram SystemAudioVolume=%80 Press the ‘Enter’ key on your keyboard. Enter your admin password when prompted, and then press ‘Enter’ again. If the above command doesn’t work for your particular Mac, then try repeating the above steps, but replace the Terminal command with one of the following: sudo nvram SystemAudioVolume=%01
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