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For some reason after a MacOS "upgrade" to 10.15 Catalina the Bluetooth Appears "Permanently" Not Available? How can I diagnose which “a device” to connect to get Bluetooth to work ?

Upgraded to 10.15.2 but no better.

bluetooth wireless settings

taskbar

not available

os version and hardware

Any suggestions? Does this have anything to do with Bluetooth pan internet sharing?

enter image description here

bluetooth demon

bluetooth not available

bluetooth plist

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  • support.apple.com/en-in/HT210642#macos1014 10.15.1 doesnt fix this if it were a bug – anki Nov 3 '19 at 11:40
  • I just updated to MacOS 10.15.2 and still I'm seeing the same problem. – Asher Dec 18 '19 at 5:37
  • Try safe boot to see if it works there or is it third party interference. – anki Dec 18 '19 at 6:27
  • ankii, interesting idea (SAFE BOOT) I just tried this and it still shows the same problem... I did notice that there is a process called "bluetoothd" (bluetooth demon) running in the Activity Monitor? In the "system preferences" the only way I'm able to access bluetooth is through the "network" and it shows that the connection "Bluetooth PAN" is not connected? – Asher Dec 21 '19 at 3:53
  • It maybe that there is some problem in /Library/Prefreferences/ and unpairing and forgetting any device that has been connected in the past. You can do this by clicking the Bluetooth icon on the top bar of your screen while holding down the Alt and Shift keys. When you see the Debug menu, first click on Remove All Devices, followed by Reset Bluetooth Module. Once you're up and running again, see if your Bluetooth works? – Asher Dec 21 '19 at 4:02
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macOS Catalina Version 10.15.6 (19G73) seems to have "fixed" some of the problem but not all of it...

The MacOS "Console" System Log still has some error messages however the bluetooth connection does show up in networking.

bluetoothhd : deny(1) mach-lookup com.apple.server.bluetooth

Here is what the screen shot of the system log files look like if you search for "bluetooth"

enter image description here

the suspicion is that this is a hardware to OS "bridge bug" that is specific to MacBook Pro's? For example... my system with...

Hardware Overview:

  Model Name:   MacBook Pro
  Model Identifier: MacBookPro11,3
  Processor Name:   Quad-Core Intel Core i7
  Processor Speed:  2.8 GHz
  Number of Processors: 1
  Total Number of Cores:    4
  L2 Cache (per Core):  256 KB
  L3 Cache: 6 MB
  Hyper-Threading Technology:   Enabled
  Memory:   16 GB
  Boot ROM Version: 162.0.0.0.0
  SMC Version (system): 2.19f12

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