after updating to the recent version of Big Sur, power chime started to no working, there is no sound when I plug in my MacBook Pro. it charges correctly so charging is not the problem. anyone else experienced this issue? how can I solve it?
Check to make sure your system volume is not muted or set very low.
You can also perform a PRAM Reset which should remove any NVRAM settings and restore the boot chime.
If this doesn't work, then try clearing the NVRAM settings using this command in the Terminal app:
sudo nvram -c
Press the "Return" key at the end of the line to execute the command. You will be prompted for your admin password. Nothing will appear on the screen as you type the password. Press the "Return" key to submit the password. Reboot your laptop to see if the startup chime is back.
If none of this works, then perhaps the .plist preference file is corrupt so you can try deleting it (and empty the Trash). Reboot the laptop so that macOS recreates the default preference file. I'm not sure where this file is located or the name of it.
Hi there, alessiap97. Rest assured that everything is normal. The chime Has been removed in Catalina or later. But is back in Big Sur... here is how to get it back... link....
https://www.howtogeek.com/700255/how-to-enable-or-disable-the-startup-sound-on-mac/
john b
Here's another data point. If I force the Mac Mini (with MacOS 11.1) to shut down by holding the power button down for five seconds, and then use the power button to restart, the chime sounds. So far, this is the only circumstance I have found when the chime sounds.
The suggested shell command (sudo nvram StartupMute=%00) has no effect. There is still no startup chime.
Another suggestion was sudo nvram BootAudio=%0; that also has no effect.
I might note that I have tried all the combinations of checking and unchecking the "Play user interface sound effects" and "Play sound on startup" checkboxes in System Preferences/Sound; using internal and external speakers; and setting the output volume to maximum before restarting. No chime.
My Mac Mini (2018 3 GHz 6-Core Intel Core i5, MacOS 11.1) will not play the startup chime. The link in the previous message does not supply an answer—the checkbox in System Preferences/Sound has no effect.
With Catalina, I had to use Terminal to enable the chime. Is that still possible?
The previous post was made before I realized it was in the MacBook community rather than the Big Sur community. The startup chime has always worked correctly on my MacBook, with both Catalina and Big Sur.
The problem is with my Mac Mini.
plaidflannel wrote:
The previous post was made before I realized it was in the MacBook community rather than the Big Sur community. The startup chime has always worked correctly on my MacBook, with both Catalina and Big Sur.
The problem is with my Mac Mini.
The same information I posted earlier applies to all Intel Macs. Some of the information regarding preference files and the command line option would apply to M1 Macs as well.
Here is an article with the command to set or disable the startup chime in the NVRAM:
https://www.macrumors.com/how-to/enable-classic-startup-chime-on-newer-macs/
power chime
