I have a MacBook Pro, and I use rEFIned to dual-boot Ubuntu and Mac OS X. In case I ever messed anything up, I installed Ubuntu on an external hard drive. However, I messed up the setup so I installed GRUB onto the hard drive. Now when I boot GRUB without my external hard drive connected, GRUB goes into grub rescue with "Cannot find device." I can still boot any of my OSes if the hard drive is plugged in.
How can I fix this? Will uninstalling GRUB from the hard drive help, or do I have to configure rEFIned differently?