Technically, the problem with the ISO is it will not boot in a EFI environment, but the OS itself should be fine (as long as your computer works with unsigned boot). After the install, start a command shell, and try this and see if it works?
1. After install, start a command shell.
2. Changeroot to remount the install edition as your root. I can't remember offhand what the path is, but you can find it in df or mount, then run chroot
chroot /path/to/your/install/partition
sudo grub-mkconfig -o /boot/grub/grub.cfg
sudo grub-install --target=x86_64-efi --bootloader-id=grub_uefi --recheck grub-mkconfig -o /boot/grub/grub.cfg