I just did the procedure on linux, I will try, but I have this error.
sudo bash ./make_bootable_linux
INFO: make_bootable_linux v1.3
INFO: The following device appears to be the unRAID USB Flash drive: /dev/sdd
Permit UEFI boot mode [Y/N]: y
INFO: unRAID USB Flash drive currently mounted to /media/jonathan/UNRAID, copying temporary installer files to /tmp/UNRAID
umount: /media/jonathan/UNRAID: the target is active.
To continue you may need to enter your admin password
sudo: /tmp/UNRAID/syslinux/make_bootable_linux.sh : command not found