[Bug 633983] Re: Can't boot amd64 live cd on Mac (EFI)

[PetrolPC]

I'm experiencing this bug when attempting to install Linux Mint 17.3 64 bit, Ubuntu 14.04 LTS 64 bit and Debian 8.7.1 64 bit. The issue does not arise when installing the 32 bit versions.
My Macbook specs can be found here:
http://www.everymac.com/systems/apple/macbook/specs/macbook-core-2-duo-2.0-white-13-specs.html

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https://bugs.launchpad.net/bugs/633983

Title:
  Can't boot amd64 live cd on Mac (EFI)

Status in Ubuntu CD Images:
  Fix Released
Status in Release Notes for Ubuntu:
  Fix Released
Status in casper package in Ubuntu:
  Invalid
Status in linux package in Ubuntu:
  Invalid
Status in syslinux package in Ubuntu:
  Invalid
Status in casper source package in Maverick:
  Invalid
Status in linux source package in Maverick:
  Invalid
Status in syslinux source package in Maverick:
  Invalid

Bug description:
  Previous release livecd's were bootable by holding down option while
  the cd was in the drive and selecting the "Windows" cd.

  Trying this with the Meerkat beta desktop livecd image (md5sum verified) I just get two numbers (1. and 2.) which look like
  they should be labeling some text but there is no text visible and the message to select CD-ROM boot type.  Typing either a 1 or a 2 doesn't do anything.

  Googling revealed that some Windows beta iso images had the same problem booting on Macs; apparently in this case it was an issue that the Windows version had EFI support (and so didn't use the BIOS fallback) but was assuming a newer version of EFI.
  There were some other posts which claimed that it was that the iso image was generated incorrectly (something having to do with ISO9660 versions).

  Unfortunately, even though I develop software for a living, there is
  nothing I can do to help debug this (except try newer versions) since
  once I get to that message, everything seems unresponsive.

  The upshot is that a useful thing which I did frequently in older
  versions (i.e. boot the 64bit desktop livecd on this macbook) no
  longer works.

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