I'm running ElementaryOS Loki on a MacBook Pro which was previously running OS X 10.11.5. Now, I want to boot something (another Linux) alongside Elementary, but I can't figure out how to set up
grub, which isn't showing up by default on system startup.
I've tried using
grub-install /dev/sda (with and without
--recheck), but all I get is:
Probing devices to guess BIOS drives. This may take a long time. sed: can't read /boot/grub/device.map: No such file or directory grep: /boot/grub/device.map: No such file or directory /dev/sda1 does not have any corresponding BIOS drive.
How can I properly set up
grub on my machine? I'm specifically looking for the selection menu and option to go to a
grub prompt on startup.