a guy who is bored
thanks for your advice it's working now but the mac os sierra installer i made for Dell 7559 UHD ...it's kernel panic upon booting i used the EFI folder from my working EFI el capitan installer change the simbios and invalid fakeid 0x12345678...but with my desktop i was able to install sierra... can u share with me your efi configuration for sierra dell 7559