FreeBSD can read and manipulate EFI variables in general. It would be interesting to see what happens when you try efivar or efibootmgr in FreeBSD. Grab the m

FreeBSD can read and manipulate EFI variables in general. It would be interesting to see what happens when you try efivar or efibootmgr in FreeBSD. Grab the memstick image from here: https://download.freebsd.org/releases/ISO-IMAGES/14.0/ https://download.freebsd.org/releases/ISO-IMAGES/14.0/ Uncompress it, and dd it to your USB drive. (dd if=FreeBSD-14.0-RELEASE-amd64-memstick.img of=/dev/sdb bs=1m conv=sync, assuming sdb is your usb stick..)