Q: USB Bluetooth adapter stops working after 10.8.5 upgrade

That was my thought as well, but before opening the Broadcom kext, I found that that the CSR kext already has the correct entry (and there wasn't much I could do there). I have made a backup copy of all the files and I'm able to restore them whenever I want anyway. What puzzles me is how is possible that a patch (thought to fix some issues and improve the user experience, along with other things) actually manages to break things that were working perfectly previously. From now on I'll think twice before updating my Mac OSX.

I'll keep looking/trying and I'll post the solution (if I'll ever find it) as soon as I manage to fix the problem.

This is the string that you can already find in the original kext:

<key>CSRUSBBluetoothHCIController</key>

          <dict>

          <key>CFBundleIdentifier</key>

          <string>com.apple.iokit.CSRBluetoothHostControllerUSBTransport</string>

                              <key>IOClass</key>

                              <string>CSRBluetoothHostControllerUSBTransport</string>

                              <key>IOProviderClass</key>

                              <string>IOUSBDevice</string>

                              <key>idProduct</key>

                              <integer>1</integer>

                              <key>idVendor</key>

                              <integer>2578</integer>

          </dict>

It looks perfectly fine (idProduct and idVendor are correct), but still, it doesn't fix the problem. The device is seen as on (and the small blue LED on it blinks) but I can't seem to find any bluetooth device nor can I deactivate it.

I've always been using the CN516 USB Bluetooth adapter from Sitecom, but bluetooth started to break when using 10.8.5. Tampering the info.plist for Cambridge Silicon like previous people here have done didn't work, so I decided to reinstall the combo update 10.8.5 and directly after that the suplemental 10.8.5 update. Then I deleted the com.apple.bluetooth.plist in Preferences. Reboot / Pair bluetooth devices...

Voila, I'm happily navigating with my trackpad and typing this message on my wireless bluetooth keyboard. Seems like things are back to normal...

Not sure yet if these connections will survive a reboot though :-)

It would seem that the Supplemental Update has completely solved my problem with my ancient Cambridge Bluetooth dongle.

I have a Mac Pro 5.1

Bluetooth and Magic Mouse and Ati Radeon HD 5770 have a problem.

More often, my screen flickers. The Magic Mouse jumping every now and then on the screen AOC Monitor.

Graphics card has been replaced from Apple.I firmly say it is because of Bluetooth.Sorry for my bad englisch :-(

Greetings from Germany

Is there a bluetooth 4.0 smart dongle that works out-of-the-box for OSX 10.9.2?

After reading this thread, I'm hoping somebody can help with this issue. I have a BT Adapter: Belkin F8T065bf, Broadcom 2070 Chipset and am running OSX 10.9.2 (so I know this is the wrong forum now but it's the most relevant thread). The driver details are already in the info.plist file (so Apple presumably supports this device straight out of the box) but I still can't get the adaptor to work. My Mac is already using the internal bluetooth for devices such as my trackpad so I'm assuming that there isn't a conflict here? If so, how do I solve that problem? Any help is appreciated.

You might want to consider starting a new discussion in Mavericks. Since this one is marked solved, less people are likely to look at it. You can link to this one.