Was difficult to understand that I have to boot via legacy bios in order for the nvidia grafic to work… But after installing grub2 via CDrom I had i done ✅ now I can boot any iso from using grub2 and don’t have to relay on CD rom anymore 🥳 Next will be a 2013 MacBookPro (with nvidia as well), as soon as my motor buys her m3 MacBookPro