Hello @mkuzminov ! Thank you your precious help! I managed to get my machine to boot thanks to your files! Did you manage to solve the audio issue? I tried installing VoodooHDA 2.8.8 but it makes my computer boot in a loop...so I'm stuck with no sound for the moment. Any advice is welcome. I'm on a Gigabyte Z270X-GAMING 7 and a i7700k CPU. The motherboard has a SoundCore 3D codec which is supposed to be supported by AppleALC but i still have no sound after various attempts. Do you have any idea? Thank you in advance.