Another tip

One more option:


1. Open a Terminal window


2. Check your current setting


sudo defaults read /Library/Preferences/ bluetoothCoexMgmt


It is absolutelly normal to have it stating that the setting does not exist. It just means that to revert you have just to delete it.


3. Set the new value to Hybrid


sudo defaults write /Library/Preferences/ bluetoothCoexMgmt Hybrid


4. reboot



To revert to the previous setting, either delete it if it did not exist…

  sudo defaults delete /Library/Preferences/ bluetoothCoexMgmt



… or re-write it its previous value:

  sudo defaults write /Library/Preferences/ bluetoothCoexMgmt <old-value>


Don’t forget to reboot.