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SYSTEMRESCUECD UEFI INSTALL
SYSTEMRESCUECD UEFI ARCHIVE

Shell> bcfg boot add 0 FS0:\EFI\GRUB\grub圆4.efi "GRUB" Once you boot into the UEFI shell, add a UEFI boot menu entry: If your motherboard has no such option (or even if it does), you can use UEFI shell to create a UEFI boot option for the Arch partition temporarily. # efibootmgr -create -disk /dev/sda -part 1 -write-signature -loader /EFI/GRUB/grub圆4.efi -label "GRUB" -verbose

Afterwards you can use efibootmgr to setup a menu entry, for example if you have the EFI system partition on /dev/sda1: The GRUB menu will show up and you can boot into your system. Requires more testing.Īsus Z68 Family and U47 Family # cp esp/EFI/GRUB/grub圆4.efi esp/shell圆4.efiĪfter this launch the UEFI Shell from the UEFI setup/menu (in ASUS UEFI BIOS, switch to advanced mode, press Exit in the top right corner and choose "Launch EFI shell from filesystem device").

TODO: Experimental "bless" utility for Linux by Fedora developers - mactel-boot AUR.

TODO: GRUB upstream Bazaar mactel branch.

# bless -mount=/Volumes/efi -file=/Volumes/efi/EFI/GRUB/grub圆4.efi -setBoot # bless -folder=/Volumes/efi -file=/Volumes/efi/EFI/GRUB/grub圆4.efi -setBoot Then run bless on grub.efi and on the EFI system partition to set them as the default boot options. # mount -t msdos /dev/disk0s1 /Volumes/efi In the Terminal, create a directory and mount the EFI system partition:

SYSTEMRESCUECD UEFI INSTALL

You can also boot from the macOS install disc and launch a Terminal there if you only have Linux installed. Use bless command from within macOS to set grub圆4.efi as the default boot option. You can now install GRUB normally as described here GRUB#UEFI systems.Upon completion you should have your firmware upgrade to the officially unsupported 2.x version. Run your modified binary from within FreeDOS and follow the instructions on screen.Obtain a copy of FreeDOS, flash it to a boot media and put your modified binary on the boot media as well (more on that here Flashing BIOS from Linux#FreeDOS).Change the ASCII string so that it becomes DisableSecureCapsuleFlash=0 (That's changing the last byte from hex 31 to 30).In the hex editor search for the block flag string DisableSecureCapsuleFlash=1.Open this executable in a hex editor of your choice (a good simple one is ghex).

SYSTEMRESCUECD UEFI ARCHIVE

Extract the archive to obtain the flasher executable (eg.Acquire an incompatible 2.x version of the BIOS firmware for the same model machine from Acer Acer CDN direct link mirror.The following steps can be taken to bypass the restriction and upgrade to a later revision firmware: Warning: This can potentially render your machine permanently inoperational if done incorrectly! Proceed with caution.