macOS Big Sur 11.5.1 - Startup Chime not working

Boot into Safe Mode according to Start up your Mac in safe mode - Apple Support and see if the problem persists. Reboot normally and check again.

NOTE: Safe Mode boot can take up to 10 minutes as it's doing the following; 

• Verifies your startup disk and attempts to repair directory issues, if needed

• Loads only required kernel extensions (prevents 3rd party kernel/extensions from loading)

• Prevents Startup Items and Login Items from opening automatically

• Disables user-installed fonts 

• Deletes font caches, kernel cache, and other system cache files

1- Any Third Party Applications that will interfere with the normal operation of the OS, alter, modify, remove or delete or attempt to do so is an invitation for disaster and may require a Reinstallation of the OS.

2 - Are there any AntiVirus, Disk Cleaner, Optimizers, Un-installers, etc installed which should be removed as per Developers Instructions. They are useless, unneeded, cause havoc and interfere with the normal operation of the OS and may even Corrupt the OS requiring a Reinstallation. The Built-in Security of Big Sur is all that is required.

3 - does this present when attempting to boot into Safe Mode - shift - immediately at restart ??

I did also all of the above. No success

Good 11.5.2 fixed things :-)

Hi, I am running 11.5.2 and the issue persist 😢😢

Thanks for the reply. I tried that also . No luck. I believe it has something to do with the touch Bar. My last hope is to take it to a repair or wait for a next update .

Ok, I will give it a try

thanks

Good Advise +1

Excellent👍

Hello again. I just did what you told me ,but no luck. No sound on start up . I will try to contact Apple.