Has anybody been able to successfully install Linux (Ubuntu 12.04/14.04/Kubuntu 14.04/Kwheezy 1.5) on the MacPro6,1 Mac Pro EFI Firmware Update 2.0 was applied.... I prefer Debian 7.4 based Kwheezy to Ubuntu but it has no EFI boot loader. Only K/Ubuntu 12.04/14.04 that I have tried has EFI boot loaders. Bootup seems unsuccessful although possible in BOOTCAMP/Fusion. Raw disk access but VM powers off once attempting to write to BOOTCAMP volume. Tried amongst others Supergrub2 EFI bootdisk / Refit / Refind boot-loaders but no luck. Installation to USB completes but no way to bootup afterwards as only EFI boot loader from FAT/NTFS/HFS seems to be possible. Thoughts were to try Target Disk Mode from iMac but do have thunderbolt2thunderbolt cable to try. Anybody?