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Level 1

53 points

Catalina bluetooth issues - audio output switches intermittently

After upgrading to Catalina, my Macbook Air has audio output issues when the Bluetooth is connected to Sony WH-1000MX2 headphones. Suddenly, the audio connection switches to the internal speakers and the output can't be changed. The immediate solution is to turn off/on the bluetooth on the Macbook and reconnect the headphones. But after a while the problem reoccurs.

I have tried to problem solve by the following processes:

Accessing the debug function (click the the bluetooth icon in the menu bar whilst pressing alt+shift). Remove bluetooth devices. Reset the Bluetooth module. Delete the bluetooth plist files in the library (/Library/Preferences + ~/Library/Preferences/ByHost ). Restart Macbook. Reconnect the device.
Reinstalling Mac OS Catalina

The actions mentioned above does not solve the problem.

Any help will be appreciated. Thanks.

MacBook Air

Posted on Oct 14, 2019 6:47 AM

Best reply

gmrandazzo

Level 1

13 points

Posted on Nov 15, 2019 8:49 AM

Here what I found running some debugging with Bluetooth explorer.

Actually the BT device work using the AAC codec until at a certain point the transfer of the audio information going down as you can see on the picture here... This means that it is something related to the audio codec over Bluetooth. There is a bug there. Maybe this can help engineers to solve the problem! :)

So for the moment what I experimented is that after reboot the device works until sleep mode is activated. After no way to have a working Bluetooth audio device. Of course this is not the proper way to run the device :-)

Bests

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Catalina bluetooth issues - audio output switches intermittently

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