How do I fix 'Sound (1211)' extension process exited issue on Mac mini?

Question

How do I fix 'Sound (1211)' extension process exited issue on Mac mini?

Hello

I have an M1 2020 Mac mini running iOS 26.2.

Audio is input via Esi U24XL USB interface. Audio input is a microphone via a Behringer mixer into the analog in; Output optically t a. Douk Audio amp.

Everything was working fine utill the other day I couldn't hear audio from one particular app (Anyware PCoiP used to access a remote PC). Music, Chrome, etc. all work fine. I could access and hear the remote machine on another Mac, so the remote machine was not the issue.

[Re-Titled by Moderator]

Original Title: Sound (1211)' exited.

However, now, it is not recognising my mic and when I flick between input and output in sounds in settings its very sluggish and then I got the the message: Extension Process 'Sound (1211)' exited.

I have attached the interface to another Mac and it all works fine, so I don't think it's the interface, but something specific to the Mac mini.

Has anyone got any ideas about what I can do to try and fix this issue?

Thanks in anticipation.

Mac mini, macOS 26.2

Posted on Jan 12, 2026 10:10 AM

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Answer 1

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Old Toad

Level 10

215,694 points

Jan 12, 2026 10:53 AM in response to Andrew Fenner

Give this a try: boot into Safe Mode according to How to use safe mode on your Mac and test to see if the problem persists. Reboot normally and test again.

NOTE 1: Safe Mode boot can take up to 3 - 5 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

NOTE 2: if you have a wireless keyboard with rechargeable batteries connect it with its charging cable before booting into Safe Mode. This makes it act as a wired keyboard as will insure a successful boot into Safe Mode.

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Answer 2

Jan 12, 2026 12:30 PM in response to Old Toad

Great suggestion!

That has certainly fixed my Microphone coming through now, but still no joy getting audio via PCoip, but thank you so much for getting me this far.

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