Comment 30 for bug 1213119

@Oliver Grawert referring to your comment and this Ask Ubuntu answer http://askubuntu.com/a/40480/102029 confirms the use of amd64+mac iso simply allows the BIOS installer/live session to run on a system set to run EFI mode which ultimately would mean a non booting Ubuntu. It does allow booting live session without the need to access firmware settings but is running in BIOS mode. Again the work around of installing grub-efi would need to be relied on to get Ubuntu booting EFI mode after a BIOS installation. I am still hunting down a solution to "How to install or boot Ubuntu live session EFI mode" The fact the amd64+mac iso exists and has existed for a good while proves this has been a long term problem being side stepped by those in a position to do something about it. The blaming of firmware hardcoding appears to be used as a convenient hood winking technique as i have proven this is not applicable on this hardware at least. It appears the problem is somehow grub related. The wild goose chase continues but due to the fact Windows boots and installs using EFI the question still remains "How to install or boot Ubuntu using EFI mode on an EFI 2.1 machine?"