2011年初期のモデル。モデル番号はA1278 / 2.3 GHz i5 or 2.7 GHz i7 プロセッサー。

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Why is my sound icon grayed out?

When I try to adjust the volume, the icon is grayed out. When I reboot, there is no chime. And when I go into the sound settings, it doesn't show an output. I have tried resetting the PRAM and the SMC.

Do I have to replace the speakers?

Any help would be appreciated.

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Look into the headphone jack - do you see a read light?

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i think you just need to restart the computer plug and unplug the headphone if this not work than visit http://goo.gl/RRSF7r . i hope this may help . thanks

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Same case for me, in 2019 : my macbook pro 13" early 2013 has got this greyed out sound volume icon and all the solutions found on Internet and this thread did not work at all...

Has anyone solved this please?

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does it work with headphones connected? is there a red light on in the headphone port? if so, its stuck in digital audio mode... otherwise, its likely to be either a faulty with the logic board, or a possible software glitch. naturally its easier to start with the software, so try doing a clean install (on an external drive if you don't want to do one on your internal drive)

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Mr., how can I do a clean install? Thx!

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If you are running 10.7 or later, you can boot to the recovery partition by booting the machine while holding the 'Alt' key. then select the recovery partition.

If you are running 10.6, you'll have to use the original install disks that came with the machine

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Plug your headphones back in.

Play a bit of sound through them (e.g., a song), then stop the sound.

Make sure Preferences is quit.

Launch Preferences and open the Sound pane.

While the Sound pane is open and set to Headphones, pull out the headphone plug from the jack.

It will reset itself to "Internal Speakers" and you are good to go...

this should work.as it worked for me

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Worked perfectly

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YES! Thank you!

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Worked for me as well! Thanks! I was getting stressed out about it :)

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Worked perfectly for me too! I tried doing a shortcut first, didn’t work. Followed the directions exactly as above and it worked. Thank you!

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Thank you so much - tried a whole heap of things before I cam across your suggestion :) and it worked a treat!

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Try manually deleting the following folder and doing a reboot.:

Library->Preferences: Audio

If this Answer is helpful please remember to return and mark it Accepted.

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This didn't help. Still no sound, thank you for the suggestion.

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did not help

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I did a lot of thing for my MacBook early 2011 but finally this one fixed my audio issue. stunning work. thanks.

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go to system preferences - audio - internal speakers and tick that box

mine did this today and this fixed it

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This worked for me— but only when I did it using iTunes, which was the last thing I had used with the headphones before the sound went out.

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Noor さん、ありがとうございました!
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