Results 1 to 14 of 14

Thread: EFI Boot

  1. #1
    EFI Boot
    Sennec's Avatar
    Member Since
    Jun 16, 2007
    Location
    Belgium, Brussels
    Posts
    424
    Specs:
    MacBook Pro
    EFI Boot
    I have Boot Camp installed and it has always been working normal. But today, I shut down Windows (XP) and I wanted to boot Snow Leopard again. Usually I have the option to choose between 'Mac' or 'Windows'. However, 'Mac' was now called 'EFI Boot'. And to make things even worse, when I clicked on it, a gray loading bar appeared at the bottom of the bootscreen. After it fully loaded, a blueish screen appeared with only my 'Gmail manager' icon at the top and NOTHING else! So, I'm a panicking quite a bit now.. Could anyone tell me what to do please, it'd be very much appreciated.

    My system is a mbp (early 2008) and runs the latest version of SL.

    UPDATE:
    So I launched in EFI boot mode. Somehow, quicksilver did work and I managed to launch firefox, system preferences and a few other programs. However two things struck me as unusual. There's no finder. (when I click on the apple top-left and select force quit, there's no Finder)
    Secondly, the system thinks my hard drive is full. When I try to download, install or even open a word file, I get the following warning message: "There is not enough room on the disk to save.." etc.
    Another stain on the sidewalk.

  2. #2
    EFI Boot
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    45,216
    Specs:
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, Yosemite
    Are you using any kind of boot menu or boot loader software? Or do you hold down the "Option" key and then choose which OS to boot? I ask because you said that usually you have the option to choose between Mac or Windows.

    Regards.

  3. #3
    EFI Boot
    Sennec's Avatar
    Member Since
    Jun 16, 2007
    Location
    Belgium, Brussels
    Posts
    424
    Specs:
    MacBook Pro
    I hold down the option key, that's when I can choose between Mac or Windows.
    See my post for new information. Your help is much appreciated.
    Another stain on the sidewalk.

  4. #4
    EFI Boot
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    45,216
    Specs:
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, Yosemite
    I've never seen that one before, usually, it just won't boot. Have you been keeping up with backups? Time Machine? Because it looks like you've got a corrupt Snow Leopard install (files, folders) or the hard drive is acting up.

    Boot the machine with your Snow Leopard DVD. After it boots, select Utilities from the top menu. Then select Disk Utilities. Run a verify and repair on the hard drive. Also repair permissions.

    Post back the results.

    Regards.

  5. #5
    EFI Boot
    dcow's Avatar
    Member Since
    Jan 14, 2010
    Posts
    65
    Specs:
    13" MacBook (late-2008)
    Hmm.. you can try that but I don't think that's the issue. I simply think you have the wrong directory blessed blessed. Open system preferences and select Mac as the startup disk. Reboot, don't hold down option and let us know what happens.

    If that works then reboot and hold down option and let us know what happens.

    I suspect that might not do much so if it doesn't we're going to have to do some stuff with 'bless'. If you're familiar with the command line you can start to familiarize yourself with bless by reading it's man page.

    type "bless --info" (no quotes) into terminal and let us know what it says. also do a "bless --getboot" and let us know. We can work from there.

    However, it would be really nice if simply repairing the disk fixes it (=

  6. #6
    EFI Boot
    Sennec's Avatar
    Member Since
    Jun 16, 2007
    Location
    Belgium, Brussels
    Posts
    424
    Specs:
    MacBook Pro
    A little update.
    I was able to backup my drive through Time Machine. When that was done, I booted from my SL dvd. I tried to repair the drive, but it gave an error. So I just formatted the drive then and did a clean SL install. After that I copied the files I needed from the Time Machine backup via Finder. I hope this won't happen to me again.
    Another stain on the sidewalk.

  7. #7
    EFI Boot
    dcow's Avatar
    Member Since
    Jan 14, 2010
    Posts
    65
    Specs:
    13" MacBook (late-2008)
    Quote Originally Posted by Sennec View Post
    A little update.
    I was able to backup my drive through Time Machine. When that was done, I booted from my SL dvd. I tried to repair the drive, but it gave an error. So I just formatted the drive then and did a clean SL install. After that I copied the files I needed from the Time Machine backup via Finder. I hope this won't happen to me again.
    ^^Probably the quickest fix (= Although, I was looking forward to working though/solving this one.

  8. #8
    EFI Boot

    Member Since
    Jun 26, 2009
    Posts
    9
    Specs:
    MBP 17" 2.66 core 2 duo & 4gigs ram, iPhone 3G S 16 gig, Dell Mini9 running OSX.5.7 1.6 atom
    EFI? Do you also have a Hackintosh? I know that was a bootloader program I used when making my mini9 run 10.5 You may have accidently installed on your actual mac.

  9. #9
    EFI Boot
    dcow's Avatar
    Member Since
    Jan 14, 2010
    Posts
    65
    Specs:
    13" MacBook (late-2008)
    Quote Originally Posted by tropic View Post
    EFI? Do you also have a Hackintosh? I know that was a bootloader program I used when making my mini9 run 10.5 You may have accidently installed on your actual mac.
    EFI is the preOS environment all Macs use. It's superior to a BIOS/MBR configuration because the EFI environment can be modified on the fly by the OS. It was developed by Intel in the 90s I believe. It is NOT native to Hackintosh.

  10. #10
    EFI Boot

    Member Since
    Feb 23, 2010
    Posts
    3
    similar problem
    Hello,

    I've read all the posts on this topic but so far it does not help me...
    I have a MacBook Pro, late 2006, that i used with OS X Tiger and Win XP. Several days ago, without any warning it restarted by itself and couldn't boot. Holding the option key during startup, instead of choosing between Macintosh HD and Windows, the options were EFI Boot and Windows. Choosing any of those two, my mac froze.

    I booted my mac in Target mode using another mac and i was able to acces my HDD and save all the data. I checked the disk with disk utility...it was ok. Resetting the PRAM had no efect. I tried booting from an install disk...it freezes. I formated the disk via target mode, making a second partition, bootable...same result. I checked the memory chips. I have two, without any the led bliks (normal response for lack of memory), with one of the two chips or both i get the same result...

    Does anyone have any clue what i'm dealing with? and, hopefully, an idea how to solve it?

  11. #11
    EFI Boot

    Member Since
    Jan 23, 2008
    Posts
    6
    Quote Originally Posted by eagle29 View Post
    Hello,

    I've read all the posts on this topic but so far it does not help me...
    I have a MacBook Pro, late 2006, that i used with OS X Tiger and Win XP. Several days ago, without any warning it restarted by itself and couldn't boot. Holding the option key during startup, instead of choosing between Macintosh HD and Windows, the options were EFI Boot and Windows. Choosing any of those two, my mac froze.

    I booted my mac in Target mode using another mac and i was able to acces my HDD and save all the data. I checked the disk with disk utility...it was ok. Resetting the PRAM had no efect. I tried booting from an install disk...it freezes. I formated the disk via target mode, making a second partition, bootable...same result. I checked the memory chips. I have two, without any the led bliks (normal response for lack of memory), with one of the two chips or both i get the same result...

    Does anyone have any clue what i'm dealing with? and, hopefully, an idea how to solve it?
    This is much closer to what I'm experiencing on my 2009 MacBook Pro. It's similar to the OP's issue, but I'm not sure if they're the same or different issues.

    My original OS was getting bad, so I formatted and installed a new image on the drive. I was unable to boot from the optical drive or via bootable FW drive. I ended up doing it from another Mac via Target mode. Now when I boot with Option, I get EFI Boot as the volume name, but it freezes when I attempt to boot.
    Dead-thread Necromancer!

  12. #12
    EFI Boot

    Member Since
    May 02, 2010
    Posts
    1
    same problem
    I had the same issue TWICE with dual-boot on mac: using windows then switching to max = EFI boot replacing MAC HD (though I can still boot on windows)

    Apparently, the only solution is brutal formatting or Time Machine.

    Does anyone else have a shorter solution or knows the root of the problem?
    (mac developers?)

    ...I would gladly PAY for it because I need to work on windows too.

    anyone?

  13. #13
    EFI Boot
    riverteeth's Avatar
    Member Since
    Dec 13, 2007
    Location
    Taipei
    Posts
    125
    Specs:
    Macbook Pro 15" (early 2008, pre-unibody), 2.4GHz Core 2 Duo, 4GB RAM.
    Have you guys (eagle29, sprale, and stanley2010) tried dcow's suggestions in post #5 above? i.e.

    Open system preferences and select Mac as the startup disk. Reboot, don't hold down option and let us know what happens.

    If that works then reboot and hold down option and let us know what happens.

    I suspect that might not do much so if it doesn't we're going to have to do some stuff with 'bless'. If you're familiar with the command line you can start to familiarize yourself with bless by reading it's man page.

    type "bless --info" (no quotes) into terminal and let us know what it says. also do a "bless --getboot" and let us know. We can work from there.
    "The past is not dead. In fact, it's not even past." -William Faulkner

  14. #14
    EFI Boot
    Lifeisabeach's Avatar
    Member Since
    Sep 30, 2007
    Location
    The Republic of Neptune
    Posts
    7,637
    Quote Originally Posted by sprale View Post
    This is much closer to what I'm experiencing on my 2009 MacBook Pro. It's similar to the OP's issue, but I'm not sure if they're the same or different issues.

    My original OS was getting bad, so I formatted and installed a new image on the drive. I was unable to boot from the optical drive or via bootable FW drive. I ended up doing it from another Mac via Target mode. Now when I boot with Option, I get EFI Boot as the volume name, but it freezes when I attempt to boot.

    A quick Google search reveals:

    Boot Options Change To ‘efi Boot’ In Mac

    Apple - Support - Discussions - EFI Boot Bug - Disk Warrior 4.2 ...

    Boot drive options change to include 'EFI Boot' | MacFixIt - CNET Reviews

    Please verify and include the exact model/year of your Mac and OS X version number (available from "About This Mac", then "More Info" on the Apple menu).
    ------
    Links: Onyx | EasyFind | Apple Hardware Test | How to test your hard drive | The Safe Mac » Adware Removal Guide | Uninstall MacKeeper
    ------
    Lifeisabeach - Mac-Forums Member of the Month June 2009, Feb 2012, and March 2013.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Problem with restart and Boot EFI
    By Torchardy in forum OS X - Operating System
    Replies: 7
    Last Post: 02-07-2013, 09:30 AM
  2. EFI Boot Error?
    By ScottKrieger in forum OS X - Operating System
    Replies: 7
    Last Post: 11-18-2012, 07:10 PM
  3. EFI boot, no startup!
    By serisin in forum Apple Desktops
    Replies: 2
    Last Post: 12-06-2010, 12:26 PM
  4. efi boot*menu
    By maxbucknell in forum Running Windows (or anything else) on your Mac
    Replies: 3
    Last Post: 03-01-2010, 09:47 PM
  5. EFI boot ???
    By eagle29 in forum OS X - Operating System
    Replies: 1
    Last Post: 02-26-2010, 02:34 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •