With my Mac Pro 5,1 my sound settings are as follows: *direct 3.5mm output to pc speakers (default sound out) *HDMI out from GTX1080 card over to HDMI switcher, then Optical out to my soundbar When I'm in Boot Camp Windows 10 mode, the OS detects my soundbar just fine and I can output the sound using HDMI, but with Sierra (planning to upgrade to High Sierra), all I see is just a) built-in Mac Pro internal speakers, b) audio line out (my current pc speakers) or c) built-in Mac Pro optical digital out port. I do not see HDMI out. Is this intended and not possible? I did notice that I may have to disable SIP and install stuff but it was such a pain to make my Handoff available since I bought a separate apple airport wifi/bt card and went through a lot of trial&error to make this work! Thanks.