Bluetooth not available

[binaryduke]

I upgraded my CMP with a replacement BT/Wifi card. All has been working well for many months. Suddenly this morning the machine rebooted and since the reboot I'm met with 'Bluetooth not available' in the menu bar. I've tried resetting the SMC. Any further suggestions for diagnosis before I start diving into the hardware?

TIA
BD.

 

[bookemdano]

I would try another SMC reset and leave the cMP unplugged from power for longer than they say. I like to do at least a minute and also hold down the power button while it's unplugged to drain any remaining flea power from the internal components.

The BT not available thing happens to me once every few months and the SMC reset almost always fixes it. You might try a PRAM reset also.

 

[Milesc2]

This always works for me.

How to Remove Your Mac's Bluetooth Preference List

1. Open a Finder window and navigate to /YourStartupDrive/Library/Preferences.
   
   
   
2. For most you, this will be /Macintosh HD/Library/Preferences. If you changed the name of your startup drive, then the first part of the pathname above will be that name; for example, Casey/Library/Preferences.
   
   
   
3. You may notice the Library folder is part of the path; you may also have heard that the Library folder is hidden. That's true of the user Library folder, but the root drive's Library folder has never been hidden, so you can access it without performing any special incantations.
   
   
   
4. Once you have the /YourStartupDrive/Library/Preferences folder open in the Finder, scroll through the listings until you find the file called com.apple.Bluetooth.plist. This is your Bluetooth preference list and the file that has probably been causing the problems with your Bluetooth peripherals.
5. Select the com.apple.Bluetooth.plist file and drag it to the desktop. This will create a copy of the existing file on your desktop; we're doing this to ensure that we have a backup of the file we're about to delete.
   
   
   
6. In the Finder window that is open to the /YourStartupDrive/Library/Preferences folder, right-click the com.apple.Bluetooth.plist file and select Move to Trash from the pop-up menu.
   
   
   
7. You'll be asked for an administrator password to move the file to the trash. Enter the password and click OK.
   
   
   
8. Close any applications you have open.
   
   
   
9. Restart your Mac.

https://www.lifewire.com/fix-os-x-bluetooth-wireless-problems-2259967