Ideally you would just have to put two files on the FAT-formatted USB drive and that's it.įor clarity, all that is now on your USB drive is (relative to the root directory of that drive): His solution is to put an EFI loader that allows for loopback loading a UEFI-compatible ISO. I found a blog entry from AstroFloyd dealing with a very similar problem while being aware of the above. Fixing the problem with UEFI loaders for older Macs The answers from Chan-Ho Suh and Colin Watson on similar questions don't seem to reflect the current state accurately. The strange thing is that the Mac ISOs don't contain such files and instead boot and install in legacy BIOS mode, which was fine in 2006 – when Apple introduced Boot Camp – but isn't since 2012 when the rest of the industry moved to UEFI. On (older) Macs this may just be /efi/boot/boot.efi. ISOs that support UEFI booting contain a file called /efi/boot/boot can be 圆4 for AMD64, ia32 for i386, arm or a64 for ARM and so forth.
Using Linux on Windows machines, my understanding is that to boot from external media via EFI you just copy the files from the ISO to a supported filesystem on the USB drive, which is usually FAT.
Linux and Windows UEFI booting and Ubuntu Mac ISOs There seems to be some confusion about EFI booting and Ubuntu ISOs.ĭisclaimer: I don't know much about Macs, because I never happened to own or support one of these machines.
