For the Hardware->Bluetooth setting, verify that the Vendor ID is "0x5AC". Open the System Information application to verify that the system Bluetooth driver is matched to the built-in Bluetooth host controller interface (HCI). This is confirmed by the following statement in TN2295: Setting it to always causes OSX to always switch to a new BT adapter. I presume that because the vendor IDs matched ( 0xa5c) that it was not switching over to the new dongle. When a new HCI is connected, the built-in driver only disconnects from the built in HCI and attaches to the external HCI if the new module is not an Apple module. Reading the same article you referenced ( TN2295) I did a sudo nvram bluetoothHostControllerSwitchBehavior="always" which tells the system to ALWAYS switch to a bluetooth controller if one is plugged in. I had the same problem of it not showing up. I just bought a GBU521 from amazon to upgrade the BT in my MacBook8,3
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