I'm running Ubuntu 12.04 on my MacBook Air, and after a botched update attempt the OS won't boot & recovery mode won't boot. The only thing I can do is drop into the Grub2 prompt. I have a USB drive that I should be able to boot from, but after going through these commands:
I get an error that says "invalid efi path". My MacBook Air has no other OS installed, so I can't go into reFit or anything. What are my options here? I was able to get into BusyBox at one point this evening, but heck if I know how to get back to it lol. tl;dr: need to boot MacBook Air from USB drive; can only use grub2; chainloader +1 doesn't seem to work. Help?!