Hi, I installed sierra with unibeast and MultiBeast - Sierra 9.0.1 (no problems for graphics card and ethernet). But I can not activate the sound. Nothing appears in the Audio output preferences. I tried with Voddoo and ALC1150 with the same result. I advise you to drop Sierra for now and try with Capitan. I have a second SSD on which I can try Capitan at the same time. What is the procedure to follow?