Follow @astrofloyd's instructions, including:
- Obtain a copy of ISO 2 USB EFI Booter for Mac
diskutil listto find the node name of your USB drive- Format the USB drive with a single FAT32 partition (use
diskutil eraseDisk fat32 UNTITLED /dev/diskX) cdinto the drive andmkdir -p efi/boot(from the computer's root drive the path should look something like/dev/diskX/efi/boot)- Copy
bootIA32.efionto the USB drive and rename it:cp /location/of/bootIA32.efi ./boot.efi - Copy the Linux distribution
.isofile and rename it toboot.efi
Plug in the USB drive, boot, and look for the rEFInd menu. Praying optional.
Follow "Ubuntu 15.04 on Mac Mini 2,1 with EFI boot (2007 Intel) ", which references Jason Heeris's guide.
Omit the "Reformatting the EFI Partition" section of Heeris's guide to keep the Mac EFI partition (/dev/sda1).
In my experience the command $ sudo bash -c 'echo $(blkid -o export -s UUID /dev/sda1) /boot/efi auto defaults 0 0 >> /etc/fstab' contained a string DEVICE=/dev/sda1 that will bork /etc/fstab. Check the UUID blkid -o full -s UUID and then sudoedit /etc/fstab and append the correct string UUID=XXXX-XXXX /boot/efi auto defaults 0 0 and the Ctrl+X to save and exit. Then mount the EFI partition before continuing, sudo mount /boot/efi