mac pro mid 2012 startup chime missing

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hania00 Author

Level 1

4 points

mac pro mid 2012 startup chime missing

Hi All,

I have just realised that my start-up chime is missing.

I have done some research & tried to get it back using Terminal & typing in the following :

sudo nvram StartupMute=%00.

However, this made no difference.

I also tried resetting the PRAM - but again, no sound.

Mac Pro Mid 2012

MacOS Mojave 10.14.6

Processor: 2 x 3.46 GHz 6-core Inter Xeon

Memory: 128GB 1333 Mhz DDR3

Startup disk : SSD

Graphics: Radeon RX 580 8 GB

Any ideas?

Many thanks in advance

Posted on Nov 10, 2021 9:14 AM

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Answer 1

Nov 10, 2021 9:17 AM in response to hania00

Have you set the System Volume to zero?

have you inserted any devices in the headphone jack lately? it is partly mechanical, and if your Mac "thinks" there is something plugged in, you will not hear the speaker.

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Answer 2

hania00 Author

Level 1

4 points

Nov 10, 2021 10:33 AM in response to hania00

Still no chimes on restart.

However, I had a look again at the Sound outputs screen - and changed to Internal speakers- and got the chimes...

So, if I want to boot from a Bootable Installer, I need to change to the Internal Speakers...thanks for putting me on the right track.

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Answer 3

hania00 Author

Level 1

4 points

Nov 10, 2021 9:26 AM in response to Grant Bennet-Alder

I'll switch off the sound bar & restart & see if I get it then, thanks

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Answer 4

hania00 Author

Level 1

4 points

Nov 10, 2021 9:21 AM in response to Grant Bennet-Alder

System Volume is max - however I do have a sound bar plugged in....

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Answer 5

Nov 10, 2021 9:25 AM in response to hania00

Does the sound bar require a driver to produce sounds? if so, that driver will not be resident until the log-in screen.

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mac pro mid 2012 startup chime missing

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