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Fix Frozen Bluetooth
If Bluetooth (especially on Mavericks) refuses to connect and cannot be switched off it can be restarted (without having to reboot) using these commands from terminal...sudo kextunload -b com.apple.iokit.BroadcomBluetoothHostControllerUSBTransportsudo kextload -b com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport