I also have problem, I don't have sound on HDMI output. I have a GTX 1060. I put the HDMIAudio.kext (1.1) in S/L/E, I also tried in Clover/kexts/other, I tried with both then just in S/L/E then just in Clover/kext/other but it's not working. It worked once but I don't know what I did, because I was already trying to make working dual monitor in same time so it's possible I updated something else but I didn't rembember. Thanks for your help, Will. EDIT: Actually it works since I changed my HDMI cable, it was certainly defective.