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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.
Question: Q: How to reverse: sudo nvram SystemAudioVolume ...
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.. The closest thing to changing the sound is a …
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/
sudo nvram SystemAudioVolume=%01 sudo nvram SystemAudioVolume=%00 sudo nvram SystemAudioVolume=" "(In the above command, that’s a single space character between the quotation marks.) Many websites say you can silence your Mac at boot by pressing the “Mute” button on your keyboard and holding it down right after you boot the Mac up.
sudo nvram SystemAudioVolume=%80不管用怎么办_wwwwws的 …
https://blog.csdn.net/wwwwws/article/details/114224900
sudo nvram SystemAudioVolume=%80不管用怎么办？. ubuntu下命令行输入 sudo: ./xxx.sh：找不到命令 在命令行中运行 sudo ./xxx.sh时遇到问题----找不到命令 解决办法： 右击xxx.sh文件，打开属性———>权限——>勾选允许作为程序执行文件 退出即可 你好！. …
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.
What happened to the "SystemAudioVolume" after …
https://www.reddit.com/r/hackintosh/comments/rqu66a/what_happened_to_the_systemaudiovolume_after/
What happened to the "SystemAudioVolume" after Monterey OR OpenCore 0.7.5? DISCUSSION. So ever since updating to Monterey with OC 0.7.5 the SystemAudioVolume NVRAM variable is stuck at 30. It used to be 46 (max) and would scale down or up as I changed the volume so that the boot chime wouldn't wake everyone in the home up at night.
Mac startup chime: How to make it work or mute it …
https://www.cultofmac.com/686749/how-to-resurrect-your-macs-startup-chime/
sudo nvram SystemAudioVolume=" "Changing all the time. And that’s about it for today’s chime-related antics. The ability to switch the …
Macの起動音を小さくするには - らいちのヒミツ基地
https://www.secret-base.org/entry/mac-boot-sound
nvram -p. SystemAudioVolumeDB とは違うのでご注意を。 見つけにくいようなら下記のようにSystemAudioVolumeでgrep（特定の文字を含む行の抽出）しても良いです。 nvram -p | grep SystemAudioVolume. オプション -p は「Print all of the firmware variables.」とさ …
The Lag in Boot Chime Volume Adjustment based on …
https://github.com/acidanthera/bugtracker/issues/971
The change in macOS preference will overwrite NVRAM once NVRAM works natively (mine works). So with the change of volume setting in macOS will change the volume in OC (AudioDxe). Which means when I set the volume to 100% in macOS I will hear the boot chime in 100% volume; where if I set to 10% in macOS, the boot chime will first start with 100% ...
Mac boot chime only works after NVRAM reset. · Issue #1012 ...
https://github.com/acidanthera/bugtracker/issues/1012
00:610 00:021 OC: Setting NVRAM 7C436110-AB2A-4BBB-A880-FE41995C9F82:SystemAudioVolume - ignored, exists The only thing I needed to do was adding a key in the "delete" section for this NVRAM variable in order to delete the macOS zero volume setting and force the 0x46 value entered in the "add" section.
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