Bluetooth died with update to MacOS Ventura and Bluetooth Controller will not power back on

I had this exact issue today on my 2019 Ventura Mac Pro - as a matter of fact I found this thread by searching on the output of system_profiler SPBluetoothDataType from the terminal:

 Bluetooth Controller:

 Address: NULL

 State: Off

 Chipset: BCM_4350C2

 Discoverable: Off

 Firmware Version: v0 c0

 Product ID: 0x0001

 Supported services: 0x382039 < HFP AVRCP A2DP HID Braille AACP GATT Serial >

 Transport: UART

 Vendor ID: 0x004C (Apple)

I would try to turn on bluetooth from the top right menu bar - hit the oval switch and it would look like it was turned on (blue) but when looking at the Bluetooth settings the icon would just spin and there where no devices present. Of note when I used opt shift and then clicked on Bluetooth settings it would indicate that the bluetooth service was not discoverable which would make sense, since the service was not stated. I also tried sudo pkill bluetoothd from the terminal with a restart and sudo pkill bluetooth from the terminal with a restart. The only thing either of these achieved was setting the bluetooth switch back to off when the machine came back up. Also of note this whole time the bluetooth icon in the top right menu had a left to right, top to bottom \ slash through the bluetooth icon in the bar indicating it was (I believe since I could not find any info on it) that the service was not functional.

Nothing suggested online made any difference for correcting this situation. Bluetooth simply was not functional and could not be turned on, even though you could turn on the switch and it would highlight as if turned on in settings. I even went as far as unplugging all (and I have many - above 20 - as this machine is part of a music studio) USB devices (which is complete garbage in my opinion but I tried it along with multiple reboots because is was another of one of those online "this might help" suggestions that are wrong about 99.9 percent of the time).

Here is what I had to do for the fix. Reboot the Mac Pro Ventura into recovery mode with cmd r held down during reboot. Then chose the reinstallOS into the original target disk. This is very poorly explained online - it's called a step by step guide -> use it Apple, it is too easy to completely hork your system by making the wrong choice during the process. But doing this reinstalled Ventura into the target disk without changing any settings or uninstalling/overwriting any applications and all the machine settings/logins and configurations were intact. It took about an hour give or take.

Another important point when doing this procedure you need to have a keyboard and mouse that is directly connected to the machine. When the Ventura OS reinstall was complete the bluetooth service fired right up and it could discover my Airpod Pros as well as my smart/magic keyboard and tracker. This is now the current output of system_profiler SPBluetoothDataType from the terminal:

    Bluetooth Controller:

     Address: F8:FF:C2:0C:48:45

     State: On

     Chipset: BCM_4364B3

     Discoverable: On

     Firmware Version: v91 c4210

     Supported services: 0x382039 < HFP AVRCP A2DP HID Braille AACP GATT SerialPort >

     Transport: UART

     Vendor ID: 0x004C (Apple)

   Not Connected:

     EXPC02G41Q3MD6V:

       Address: 88:66:5A:52:3C:AD

     Michael’s AirPods Pro:

       Address: A0:A3:09:23:DD:98

       Vendor ID: 0x004C

       Product ID: 0x200E

       Case Version: 1.4.0

       Firmware Version: 6A321

       Minor Type: Headphones

       Serial Number: GX**059

       Serial Number (Left): GX**C6K

       Serial Number (Right): GX**C6J

This was the only way I could find to restore the Bluetooth service without a complete rebuild (this was close enough) but thankfully I didn't have to reinstall 156 apps and reconfigure the machine post a completely fresh install. the machine was exactly the same as before the situation, configured for three huge screens with differing resolutions, and all logins and settings intact.

As a suggestion and a caveat, I would cross reference this outlined process with other references online for OS recovery, this is an Intel Mac Pro and the process can vary slightly by model and chipset. Also it is tricky and nerve wracking and requires patience! I have done mac pro rebuilds many, many times so I am familiar with the process. Start with an older cheese grater mac pro if you have to to get a feel for it. I would not recommend this for a first timer unless you are willing to completely reinstall your OS from scratch and reinstall all your apps if you make a mistake. But I will tell you that it worked and restored the Bluetooth service to functionality (running) when nothing else would work.

[Edited by Moderator]