grub.cfg

# Load environment if available
if [ -s $prefix/grubenv ]; then
  set have_grubenv=true
  load_env
fi
set default="0"

# See if we are trying to reload a failed boot
if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

# Records the new default option
function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}

set gfxpayload="text"

# Timeout for menu
set timeout=5

#########################################################
# Puppy linux

menuentry "Lucid Puppy 5.2.8" {
  fakebios
  set isofile="/isos/lupu-528.005.iso"
  loopback loop (${root})/$isofile
  bootoptions="loglevel=7 findiso=$isofile"

  echo Loading Linux... 
  linux (loop)/vmlinuz $bootoptions
  echo Loading initrd...
  initrd (loop)/initrd.gz
  echo And launch (this may take a short while, be patient)...
}

#########################################################
# Kali linux

menuentry "Kali Linux 1.5 amd64" {
    fakebios
    set isofile="/isos/kali-linux-1.0.5-amd64.iso"
    loopback loop (${root})/$isofile
    bootoptions="findiso=$isofile boot=live noconfig=sudo username=root hostname=kali"

    echo Loading Linux... 
    linux (loop)/live/vmlinuz $bootoptions
    echo Loading initrd...
    initrd (loop)/live/initrd.img
    echo And launch (this may take a short while, be patient)...
}


#########################################################
# Talis linux

menuentry "Talis Linux 0.21 x86" {
    fakebios
    set isofile="/isos/tails-i386-0.21.iso"
    loopback loop (${root})/$isofile
    bootoptions="findiso=$isofile boot=live config live-media=removable nopersistent noprompt timezone=Etc/UTC block.events_dfl_poll_msecs=1000 splash nox11autologin module=Talis quiet"

    echo Loading Linux... 
    linux (loop)/live/vmlinuz2 $bootoptions
    echo Loading initrd...
    initrd (loop)/live/initrd2.img
    echo And launch (this may take a short while, be patient)...
}

menuentry "Talis Linux 0.21 x86 failsafe" {
    fakebios
    set isofile="/isos/tails-i386-0.21.iso"
    loopback loop (${root})/$isofile
    bootoptions="findiso=$isofile boot=live config live-media=removable nopersistent noprompt timezone=Etc/UTC block.events_dfl_poll_msecs=1000 splash nox11autologin module=Talis noapic noapm nodma nomce nolapic nomodeset nosmp vga=normal"

    echo Loading Linux... 
    linux (loop)/live/vmlinuz2 $bootoptions
    echo Loading initrd...
    initrd (loop)/live/initrd2.img
    echo And launch (this may take a short while, be patient)...
}


#########################################################
# Ubuntu linux

menuentry "Ubuntu linux 13.10 Desktop (mac version)" {
    fakebios
    set isofile="/isos/ubuntu-13.10-desktop-amd64+mac.iso"
    loopback loop (${root})/$isofile
    bootoptions="boot=casper iso-scan/filename=$isofile noprompt"

    echo Loading Linux... 
    linux (loop)/casper/vmlinuz $bootoptions
    echo Loading initrd...
    initrd (loop)/casper/initrd.lz
    echo And launch (this may take a short while, be patient)...
}

menuentry "Ubuntu linux 13.10 Desktop (standard 64bits)" {
    set isofile="/isos/ubuntu-13.10-desktop-amd64.iso"
    loopback loop (${root})/$isofile
    bootoptions="boot=casper iso-scan/filename=$isofile noprompt"

    echo Loading Linux... 
    linux (loop)/casper/vmlinuz.efi $bootoptions
    echo Loading initrd...
    initrd (loop)/casper/initrd.lz
    echo And launch (this may take a short while, be patient)...
}

menuentry "Ubuntu linux 12.10 Desktop (mac version)" {
    fakebios
    set isofile="/isos/ubuntu-12.10-desktop-amd64+mac.iso"
    loopback loop (${root})/$isofile
    bootoptions="boot=casper iso-scan/filename=$isofile noprompt"

    echo Loading Linux... 
    linux (loop)/casper/vmlinuz $bootoptions
    echo Loading initrd...
    initrd (loop)/casper/initrd.lz
    echo And launch (this may take a short while, be patient)...
}

thanks for this grub
i want add backtrack to this grub what should i do?
is this correct?

Backtrack

menuentry "BT5R3-KDE-64" {
fakebios
set isofile="/isos/BT5R3-KDE-64.iso"
loopback loop (${root})/$isofile
bootoptions="findiso=$isofile boot=live noconfig=sudo username=root hostname=kali"

echo Loading Linux... 
linux (loop)/live/vmlinuz $bootoptions
echo Loading initrd...
initrd (loop)/live/initrd.img
echo And launch (this may take a short while, be patient)...

}

Many hours and now days have passed in my quest to install Linux (of ANY kind) on my Macbook Pro 3,1. I have been led to your door but have yet to make anything work.

I have been trying to install ANY of the versions from your grub.cfg file only to have each of them hang and stop installation.

I tried using Linux Mint with the MAC USB Loader from SevenBits but continue to get stuck and the Grub prompt each time.

It does concern me that these posts all seem to stem from at least four years ago so I do fear that there is an easier way to get this done but I have yet to stumble upon it.

So my question is this: what do you suggest will be the best way to install ANY kind of Linux on my MacBook Pro 3,1?