Some BIOSes tuned to search /EFI/Microsoft/Boot/bootmgfw.efi Usually an UEFI BIOS searches /EFI/BOOT/BOOTX64.EFI. Modern computers have UEFI BIOS which is much larger then legacy BIOS and able to start some EFI-applications from some drives. It can be installed from macOS by commandĭd if=/dev/rdisk0s1 count=1 bs=512 of=origbsĭd if=origbs of=newbs skip=3 seek=3 bs=1 count=87 conv=notruncĭd if=newbs of=/dev/rdisk0s1 count=1 bs=512 We have several variants but recommended one is boot0af So use boot1hfs on HFS+ filesystem, use boot1f32 on FAT32 filesystem, boot1ex on exFAT file system and more.Īfter years of investigations we decided to choose one case:ĭrive must be formatted to GPT and have first partition EFI formatted to FAT32. The program PBR intended to use on the specific file-system. The program boot0 searches the partition table of the drive, finds first partition position (PBR) on the drive and reads there first one or two sectors named boot1. The BIOS read first sector (MBR) from the physical drive into memory and start is as a program written in 16bit codes. Old computers (legacy computers) have legacy BIOS which is able to boot some drive HDD, CDROM or USB-HDD. When you power on your computer you see BIOS which want to start some operating system. If you want to make this manually then read carefully. Each Clover revision contains file Clover***.pkg which is macOS executable installer to make all work automatically.
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