

Go ahead and copy from that line until the end. Open this file in a text editor and what you'll really need are the lines that begin with menuentry "Try Ubuntu without installing".

I guess either will work (and someone with more expertise might correct me later saying which one is better). Since I also have a copy of the Ubuntu 18.04 here, I just looked and it has the same folder, but with both 'grub.cfg' and 'loopback.cfg' there. The one I was using last week was Ubuntu 14.04, so I opened the flash drive created with this iso and found a 'boot/grub' folder and a 'loopback.cfg' inside.

Usually, the configuration for grub is in a file with '.cfg' extension.

Most Linux distros, such as Ubuntu use Grub as a bootloader, and it uses a menu to display the OS boot options for you. Go ahead and create the USB flash drive with any distro you prefer. It will be 'efi/boot' and inside boot you'll find 3 files. Open the flash drive (or the mounted ISO) and copy the whole 'efi' folder anywhere on your computer. So either create a flash drive with the previous ISO, or mount the ISO. Or better yet, if you have any computer with a Linux OS, you may be able to just mount the ISO (just as a Mac would mount a DMG), and copy the files from there. You'll only need the flash drive created with this. So here you go:ĭownload a version of, which is a simple Linux distro that only runs a media center. As I'm not an expert, what I did was copy/paste from another working flash drive that I created with a distro that worked just fine to be bootable form that Mac Mini. In my findings you just need an extra folder to be included on the flash drive, which is 'efi/boot/', and inside that folder you'll need a few files. I'll write a tutorial sometime in the next few weeks (I still want to find another working ISO, other than the one I've used), but it is actually quite simple. What I've discovered is that most Linux distributions don't have an EFI implementation on their ISOs that satisfies those old Macs. I've been searching and trying for a while. I have successfully created a bootable USB for a Mac Mini 2,1 (2007) just last week.
