Is it possible to use Bluetooth in the iMac Pro 2017 to "cast" audio to a Denon Bluetooth receiver? I may be misunderstanding the use of Bluetooth, but I cannot get the mac and receiver to 'pair'... is there a trick to this, or is this not even possible? When both devices are set to pair, nothing happens. Bluetooth is ON for both. I only have 3 active Bluetooth pairings (keyboard, mouse, track pad), and I understand there can be up to 8 devices. The mac and Denon are in different rooms but within range of each other.