The Host Control Selector dialog has a drop-down with, in my case, two options - the default “Apple BRCM” Bluetooth adapter and my new Belkin adaptor with “Broadcom Corp” Bluetooth chip. Select HCI Controller Selector (⌘K) from its Tools menu and the Host Control Selector dialog box appears. Nothing appears to happen when you run Bluetooth Explorer, but that’s because there’s no window and everything happens via its menu bar. Open the downloaded file (“hardware_io_tools_for_xcode_october_2013.dmg”) and drag the Bluetooth Explorer app to your Applications folder. Flushing my browser cookies and cache fixed it. This seems to be a glitch with the site, since it happened to me with both Chrome and Safari. One thing to watch - the results list routinely came up blank when I was poking about on that page. I can’t link to the download directly, so you’ll need to search for “Bluetooth” from the Downloads for Apple Developers page. This is only available from the Apple Developer site, which requires free registration to access. The solution was to download the Bluetooth Explorer app, which is part of the Hardware IO Tools for Xcode bundle. After plugging in the Belkin Mini BluetoothV4.0 USB Adapter to fix my erratic Magic Trackpad problems on my MacBook Pro, there was no obvious way to tell if it was identified or working.
