Build as in my signature, everything works fine except on-board audio since I used ODAC as my sound card. - Sierra installed, installer EFI folder copied to Sierra EFI, reboot, passed. - Necessary kext installed with Multibeast, a fully functioning machine. - Update 10.12.6 installed, restart. At login menu, unable to enter password since keyboard not working. - Rebooted back to clover, keyboard functioning. - Boot till Sierra log in menu, keyboard not functioning. NumLock LED indicator is on, capslock doesn't respond. - Boot Sierra USB installer, keyboard functioning. - EFI folder both Sierra and installer explored with Linux, VoodooPS2Controller.kext found in kext folder. Plan to buy USB keyboard later to troubleshoot, but for now I want to fix this issue assuming it's the PS2 problem.