Is there a way to boot into grub on a mac rather then OSX?

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Solution 1

This is how, macs either boot in bios/csm or EFI mode, so if the wrong boot mode is selected it wont boot the right away.

  1. You can change it by selecting the startup disk, rebooting to macOS is EFI (even if its not macos),
  2. the others are BIOS (it is expecting to boot windows) and it will load regular bootloaders.
  3. The third option is to have macos-like efi or boot partitions with other bootloaders inside.

If you dont have macos/win installed then use the macos install media to switch the setting.

Solution 2

This post at glandium.org might be of interest:

Debian EFI mode boot on a Macbook Pro, without rEFIt,

as bigbadonk420 pointed out in a comment

This worked for me.

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Rainbow Dash
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Rainbow Dash

Updated on September 18, 2022

Comments

  • Rainbow Dash
    Rainbow Dash over 1 year

    I have successfully installed Ubuntu 14.04.2 on a Mac Mini(late 2014).Now I can get to the new installation by pressingAlt > EFI BOOT to get to GRUB and selecting Ubuntu to boot the OS. My question is How can I boot into GRUB without pressing Alt >GRUB. I would like GRUB to come up before anything else.

    I know some tools like reFIND to dual boot with OS X. but, I don't want to install reFIND because of various issues like when I install it (My screen goes to black whenever I preform a full shutdown, reFIND still appears but, due to the monitor being off for some reason I cannot see my boot menu. The only way I am able to get my monitor working is to bypass reFIND(which I removed) by reseting the NVRAM(Windows Key + Alt+ R +P).

    What I want:

    I would like GRUB to show up like reFIND show up on boot without being triggered by startup manager (or other). I have moved /boot/efi/EFI/Ubuntu/grubx64.efi to /boot/efi/EFI/boot/bootx64.efi. I have tried refind but, encountered problems.Note: Both OS X and Ubuntu installed in EFI mode(and that's the way I'd like to keep it).

    So is this even possible?

    • pzkpfw
      pzkpfw about 9 years
      This might be of interest: glandium.org/blog/?p=2830
    • pzkpfw
      pzkpfw about 9 years
      If you figure it out, please come back and answer your own question, in case anyone else has the same issue :)
    • Rainbow Dash
      Rainbow Dash about 9 years
      Ok. Still looking at it. I destroyed my GPT partition table by accident. and I am trying to restore backups and other stuff
  • nilsonneto
    nilsonneto about 9 years
    Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference.