Investigate Creating FAT32 ISO File for UEFI WinPE Kickstarts on macOS

[h4xhor]

• Using mkisofs doesn't create a bootable UEFI ISO on Linux Worker.
• Using mkfs.msdos to create a FAT32 ISO file is bootable on Linux Worker.
• From Create Bootable UEFI ISO , it says I need to put the efi/boot/bootx64.efi in a FAT filesystem so I can’t escape from not using mkfs.msdos.
• It looks like macOS has diskutil and newfs How do you make filesystems in mac OSX but they don’t seem to be able to create a FAT32 file.
• From create file that can be mounted it looks like hdiutil can create a FAT32 file.
• Here is information from man hdiutil. It looks like we can use the makehybrid option.

     create size_spec image
                create a new image of the given size or from the provided data.  If image already exists, -ov must be specified or create will fail.  To
                make a cross-platform CD or DVD, use makehybrid instead.  See also EXAMPLES below.