Mac: Erroneous EFI/redhat/grub.efi option at rEFIt boot after F15 upgrade

[Soulstorm]

I was using Fedora 14, and I decided to do an upgrade using preupgrade on both my Macbook Pro and Intel iMac, and both of these machines worked flawlessly. The only (problem?) is that now I have one more boot option named "Boot EFI/redhat/grub.efi from EFI" in rEFIt startup screen. That wasn't there before the upgrade.

Choosing this option on my iMac results in an unbootable system error, and on my macbook pro, it opens a grub shell.

I tried going into Fedora and deleting the /boot/efi/EFI/redhat folder, to no effect.

What has happened? Is there any way to delete this option?

[stoggy]

check /boot/grub/menu.lst if you need help post it here.

[Soulstorm]

The above file lists the available linux kernels of which to boot from.

However, I need to delete the erroneous option of booting into a dummy linux system in rEFIt's login screen, before even loading linux (and grub).

[stoggy]

is it doing it during the bios boot up. or the bios has come up and its loading the efi instead of normal grub?

If the bios is doing it im not sure...

If the bios is booted up and its loading the efi instead of grub you probably need to reinstall grub on the boot disk. boot a rescue disk or installation disk into the command line and run grub.

[Soulstorm]

In Macs we use rEFIt. It always presents us with options to boot different systems than OS X, like Linux and Windows. rEFIt works with EFI. So when I load Linux using rEFIt, GRUB is automatically loaded afterwards, presenting me with options about what kernel to load Fedora with.

Macs have no BIOS, so rEFIt makes EFI to recognize the /boot volume in order to boot GRUB with Linux.

[stoggy]

ah ic.

Is there a refit boot option in /boot/grub/menu.lst?

[Soulstorm]

Well, I have progressed far into this issue.

I managed to install ext4fuse into my machine, and I have mounted my EFI partition to /efiMounted on my OS X as an ext4 filesystem. in the terminal, I see these files:

bash-3.2# ls /efiMounted
System.map-2.6.35.13-91.fc14.x86_64	initramfs-2.6.35.13-91.fc14.x86_64.img
System.map-2.6.35.6-45.fc14.x86_64	initramfs-2.6.35.6-45.fc14.x86_64.img
System.map-2.6.38.6-27.fc15.x86_64	initramfs-2.6.38.6-27.fc15.x86_64.img
config-2.6.35.13-91.fc14.x86_64		initrd-plymouth.img
config-2.6.35.6-45.fc14.x86_64		lost+found
config-2.6.38.6-27.fc15.x86_64		vmlinuz-2.6.35.13-91.fc14.x86_64
efi					vmlinuz-2.6.35.6-45.fc14.x86_64
grub					vmlinuz-2.6.38.6-27.fc15.x86_64
bash-3.2# cd /efiMounted efi
bash-3.2# ls
System.map-2.6.35.13-91.fc14.x86_64	initramfs-2.6.35.13-91.fc14.x86_64.img
System.map-2.6.35.6-45.fc14.x86_64	initramfs-2.6.35.6-45.fc14.x86_64.img
System.map-2.6.38.6-27.fc15.x86_64	initramfs-2.6.38.6-27.fc15.x86_64.img
config-2.6.35.13-91.fc14.x86_64		initrd-plymouth.img
config-2.6.35.6-45.fc14.x86_64		lost+found
config-2.6.38.6-27.fc15.x86_64		vmlinuz-2.6.35.13-91.fc14.x86_64
efi					vmlinuz-2.6.35.6-45.fc14.x86_64
grub					vmlinuz-2.6.38.6-27.fc15.x86_64

Seems the folder named "efi" must be removed.

But how can I do this? rm-rf results in a message: "Function not implemented".

Any ideas?

EDIT: SOLVED THE PROBLEM!

I also wrote a guide about Fedora 15 on a Mac and how to solve common problems.

Click this link!

The solution of the problem I describe is in there.