Volume suddenly named 'EFI boot' and can't boot OS X

Discussion in 'macOS' started by voltorben, Nov 29, 2009.

  1. voltorben macrumors newbie

    Nov 29, 2009

    After running XP in bootcamp for about a couple of hours i can't boot into OS X anymore... If i hold alt down when boot up i get two volumes: EFI boot and windows (my xp bootcamp partition)

    I read in this thread: http://forums.macrumors.com/showthread.php?t=420482 that it might have something to do with the boot.efi needing to be blessed, and that i could do that via terminal from the install DVD. So, i boot the install dvd and in terminal i write:

    bless --folder "/Volumes/Mac OS X/System/Library/CoreServices" --bootinfo --bootefi

    (i read how to here: http://developer.apple.com/mac/library/DOCUMENTATION/Darwin/Reference/ManPages/man8/bless.8.html) but it says:

    "No mount point for /Volumes/Mac OS X/System/Library/CoreServices
    Can't determine mount point of '/Volumes/Mac OS X/System/Library/CoreServices' and ' ' "

    Does anybody know why it is saying this? i thought it might be because i'm writing the volume wrong and terminal can't find it. Is there some way to list all the volumes with exact names in terminal?

    Any help would be very much appreciated!

    Thanks, Andy

    MY MAC:
    Imac core 2 due running snow leopard.
  2. J the Ninja macrumors 68000

    Jul 14, 2008
    Open Disk Utility, select your OS X volume, and click the mount button. Not the whole startup disk, the OS X volume listed under it. Then run the command. See if that does it.

    Techyness: Your OS X volume needs to be "mounted", or attached to the filesystem in order for you to bless it. It does not mount normally when you boot off the DVD, you must tell it you want it mounted.
  3. maflynn Moderator


    Staff Member

    May 3, 2009
    The efi partition was/is always there. Its not a new partition, but one that window's sees.

    Is it possible you installed XP onto your OSX partition?

    I'd restart your mac with the your OSX install disk in the drive (and holding the C key). Once you get passed the license acceptance agreement, select tools from the menu and disk utility. You should hopefully see your OSX partition.

    btw, I hope you have your data backed up
  4. Infrared macrumors 68000


    Mar 28, 2007
    The "EFI Boot" label is shown by the firmware before Windows
    has booted. It's a generic label, is unrelated to the EFI partition
    and Windows can't see it.
  5. voltorben thread starter macrumors newbie

    Nov 29, 2009
    Okay, so i finally blessed the partition. the reason i couldn't bless it before was because i thought it was called "Mac OS X" but it was called "Macintosh HD". It was actually mounted, J ninja, but disk utility came handy because it could tell me what the partitions name was, so thanks :)

    and when i start my mac and hold alt, the partition is now called Macintosh HD and not EFI boot. nice.

    BUT, when booting Macintosh HD it gets past the grey apple logo (which was where it got stuck before) and now it gets stuck at the blue screen... any ideas on how to fix this?

  6. Infrared macrumors 68000


    Mar 28, 2007
    I'm not sure what to suggest, but it might be possible to
    infer something from the system logs. You could boot from
    the DVD again and, from a terminal, have a look at the files
    in '/var/log'.

    If you haven't verified the filesystem integrity from the DVD,
    I would do that as a first step. You can do that from Disk

    Have you booted into OS X since you created your XP partition?
    If not, then something may have gone wrong when creating that
    partition. If you have, it's likely something else.
  7. voltorben thread starter macrumors newbie

    Nov 29, 2009
    i can assure you that it has nothing to do with the bootcamp installation. it has been working for a long time now, without problems (though i don't really use it). The reasen that i mentioned that it was after i had run xp, was because it was the first time xp had run for 2+ hours...

    i have verified disk permissions and disk... i'll be fiddling with it for a couple of hours, but after that i think the only thing to do is to install snow leopard again... but thanks anyway :)
  8. voltorben thread starter macrumors newbie

    Nov 29, 2009
    i can boot in safe mode all fine. it doesn't make sense...

    EDIT: and i can't make an archive and install. it's not an option on my dvd :S and now i can't enter single user mode either. it says "still waiting for root devices"

Share This Page