776      iPhone_iPad_Mac_apple

My MacBook Air will not play sound

My MacBook Air won't play sound. When I press the sound buttons (whether to increase, decrease, or mute the sound), the icon pops up grayed out with the circle and line through it symbol. When I check audio devices, it says "No devices found on the system." Under "System Preferences" and then "Sound" it shows no input or output devices found. At the bottom of this window it shows output volume at max but the mute checkbox is checked and grayed out. However, I can't uncheck it or change anything. Please help! Have already tried restarting and shutting down.

Go step by step and test.

1.Plug in and  remove the headphone.

    If you see red light in the headphone port, plug the headphone

    in and out of the port 5 or 6 times to flip the microswitch inside.

    Sound output may be stuck in the digital mode.

    Try this even if you don’t see the red light.

2. Reset PRAM.  https://support.apple.com/kb/PH14222

    Do this twice

3. Reset SMC.     https://support.apple.com/kb/HT3964

    Choose the method for:    "Resetting SMC on portables with a battery you should not remove on your own".

4. Applications > Utilities > Audio MIDI Setup

    Audio Devices window

    Side Bar

    Click the Built-in Output.

     Make sure that no box is checked under “Mute”.

5. Applications > Utilities > Audio MIDI Setup

    Audio Devices window

    Side Bar

    Click the Built-in Output.

    Under Mute any of the boxes checked? If so, uncheck it.

    Make sure that CH1 and CH2 volume sliders are at the middle and matched.

6. System Preferences > Sound> Sound Effects

    Play sound effects through:

   Select "Internal speakers" and then back to "Selected sound output device".

None of this worked for me. Under Audio MIDI Setup, there is nothing listed. Also, under System Preferences -> Sound, the mute button is checked but it is grayed out and will not allow me to uncheck it. Any other thoughts?

If you option click the sound/volume icon in the menu bar, does it show "Internal Speakers"?

It does not. It shows no input or output devices found. It shows the mute button is checked but I can't toggle the sound marker and it won't let me uncheck the mute button.

Has anything changed for you??

I have exactly the same problem word for word as you.. I have tried everything.. My sound is muted out, there's no red light in the port, the port isn't dirty, there are no options to change the sound settings.. It's like my computer has completely forgotten it ever had speakers or can transmit sound of any kind.. it doesn't play through aux or anything..

It's so weird, I think we will just have to go to apple with this as it seems like the end of the line?? Genius Bar??

hey did you fix this problem and if you did would you please let us know how you fixed it

thanks

Im having the same problem can someone please help me.

It was fine until I updated it also.

Same here. Has anyone got a solution?

最後更新：2017-09-30 09:07:03

  上一篇： Logic Pro X Post Fader & Post FX Recording

  下一篇： My iPad indicates the latest software update is...