MacBook Internal Microphone Disappearing

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MacBook Internal Microphone Disappearing

Every now and then, my internal microphone disappears from the System Preferences Sound panel, under the Input tab (screenshot), leaving me unable to select it for usage. It also doesn't appear when I `option+click` the sound icon on the upper system bar, near the clock. Rebooting usually helps, as well as resetting SMC and PRAM/NVRAM.

Apparently whenever I connect an external audio device (AirPods or a wired external headset), eventually the internal input device goes missing.

I'd love to troubleshoot this myself, but I have no clue what to look for on the Console (side note: that thing is a nightmare nowadays of so much logging that's going on there).

Took it to my local authorized Apple service rep, to no avail.

PS: there's someone else out there with the exact same issue and setup than mine: https://apple.stackexchange.com/questions/357513/mac-doesnt-recognize-internal-microphone

MacBook Pro 15”, macOS 10.14

Posted on Jun 14, 2019 2:31 PM

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Answer 1

Rivanor Author

Level 1

5 points

Jun 14, 2019 3:41 PM in response to Rivanor

Just took a peak at /var/log/system.log after finding a symptom that helped me pinpoint a timeframe when the issue was triggered. Here's my finding:

Jun 14 13:44:03 Rivanor-MacBook-Pro com.apple.xpc.launchd[1] (com.apple.imfoundation.IMRemoteURLConnectionAgent): Unknown key for integer: _DirtyJetsamMemoryLimit
Jun 14 13:44:11 Rivanor-MacBook-Pro com.apple.xpc.launchd[1] (com.apple.preference.sound.remoteservice[13150]): Service exited due to SIGKILL | sent by com.apple.preference.sound.remot[13150]

I have no idea what to do with this, though.

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Answer 2

Rivanor Author

Level 1

5 points

Jun 22, 2019 9:25 AM in response to Rivanor

One more lead: I found crash reports for coreaudiod. Here's an excerpt:

Process:               coreaudiod [211]
Path:                  /usr/sbin/coreaudiod
Identifier:            coreaudiod
Version:               1
Code Type:             X86-64 (Native)
Parent Process:        launchd [1]
Responsible:           coreaudiod [211]
User ID:               202

Date/Time:             2019-06-17 11:04:40.369 -0500
OS Version:            Mac OS X 10.14.5 (18F203)
Report Version:        12
Bridge OS Version:     3.5 (16P5200)

Sleep/Wake UUID:       4873A326-F385-4332-856A-17CD189A4FAB

Time Awake Since Boot: 8000 seconds
Time Since Wake:       5900 seconds

System Integrity Protection: enabled

Crashed Thread:        19  Dispatch queue: PlugInDevice Change Queue

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000250
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Segmentation fault: 11
Termination Reason:    Namespace SIGNAL, Code 0xb
Terminating Process:   exc handler [211]

VM Regions Near 0x250:
--> 
    __TEXT                 000000010accc000-000000010ae3c000 [ 1472K] r-x/rwx SM=COW  /usr/sbin/coreaudiod

Application Specific Information:
dyld3 mode

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Answer 3

Rivanor Author

Level 1

5 points

Jun 14, 2019 2:32 PM in response to Rivanor

For the record, all my software is up to date.

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MacBook Internal Microphone Disappearing

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