Bluetooth keeps disconnecting after update to Mac OS Catalina

I was able to fix this issue by restarting the coreaudio, bluetooth, and bluetoothaudio daemons. Open a terminal and run the following commands in order:

sudo killall coreaudiod
sudo killall bluetoothd
sudo killall bluetoothaudiod
sudo launchctl start com.apple.audio.coreaudiod
sudo launchctl start com.apple.audio.bluetoothd
sudo launchctl start com.apple.audio.bluetoothaudiod

leandrojne - It didn't for me either, but I took off each of the apps I use BT for - I used this https://freemacsoft.net/appcleaner/ to make sure there wasn't any remaining folders left behind. Restarted each time before moving to the next app. Skype for Business was the problem for me, it's been perfect for a few days now - haven't reinstalled SfB though. Hope that helps.

I too have Bose QC 35 and had the same problem when I upgraded to Catalina 10.15.2. Bluetooth was dropping in Netflix and official Zoom account too. After suffering for a while I read somewhere that they released a fix for this in 10.15.3. Upgrading to Catalina 10.15.3 solved this for me.

I updated my mac to 10.15.4 and the issue seems to have been gone

Looks like 10.15.4 fixed this for me. Bluetooth and Audio has been fine for the last 3 days now. (Sony WH-1000XM3)

I've also uninstalled Skype for Business just to be sure.

Let's hope it stays like that.

I just did a clean downgrade to Mojave from recovery mode, All the problems gone...

the problem is due to the headphone microphone input, i switched the input of my headphones to the Macbook pro microphone, it works normally

I think they fix this finally in the latest version 10.15.4. I've updated and no issue within a day of use.

I tried so many different things to fix this and I found that killing the coreaudiod process fixed the issue for me. Hope it helps!

Hi,

It happens to me 100% of the time if I try to engage the microphone with any Bluetooth headset with any application. The fastest way to test it is to connect your bluetooth headset, and then go the Sound settings, and then Input. If Bluetooth headset is selected, it will disconnect and reconnect.

It looks like macOS is telling the headset to switch between an actual phone call and just simply being a digital input device. It gets confused and then disconnects.

I have a MBP 2015 13"

Ben

As you are fresh to the thread it is difficult to suggest a fix when you have tried everything.

Assuming you have reset NVRAM, SMC and booted into Safe Boot at least once then before you either reinstall clean or revert to Mojave you could install Etrecheck, give it full disk access then attach the report here.

If it works OK on another mac user ID it is probably not apps because generally they are shared amongst users.

Something in your ~/Library folder is more likely causing it and to be honest it will take less time to switch users and move your documents and media files.

Where did you read that Catalina 10.15.3 would fix this? Because it did NOT fix the issue for me, but after updating to Catalina 10.15.4, I have my Bose QC 35 headphones have not disconnected YET. I'm hoping they actually did finally fix it.

I downgrade it to Mojave and problem solved

I had no issues when I was using my Bose QC35 II on Mojave being connected to multiple devices. I have now found that if I switch off the bluetooth on my phone (iPhone 11 Pro) that my headphones stay connected.