@Niresh i solved that error and booted the system. I rebooted it and it's not booting anymore.
I select macos from the bootloader, it starts a verbose boot and after a while the computer shuts down. Also i don't know what to do with graphics because it sets resolution to 800x600. I have a gtx750 maxwell and idk how to follow the guide you made because clover's window is too big for the resolution.