Mac partition now called efi boot?

I upgraded my HD and restored my data using a cloned image file. I am also running a second partiton with windows 7 installed. before i upgraded, when i hit 'option' to choose my boot volume, i believe my choices were "macintosh hd" and "windows(or something similar)". now my "macintosh hd" is called "efi boot" and it does not boot into mac by default but rather windows. how do i rename that partition/fix this problem?
thanks in advance
tom

Hi,
   I have this same issue.  I tried to change the partitions to say the names I want, and when I Option Boot, it still shows the incorrect name, ignoring my changes.
ideas?
Thanks.

Similar Messages

  • Trying to install SL on a new hard-drive for my iMac, when asked which disk to install on it gave me no options, i followed advice from another forum and created a partition, now can't boot from the new drive at all. Help?

    I've had **** with my iMac, the hard-drive failed so i replaced it with a new 1TB Samsung drive. Then when i tried to install SL from the install disk, all went to plan until it asked me which drive i wanted to install it on, where it came up with a box where my options should have been, but instead it didn't give me any options to install it on any drive i.e. it asked which drive i wanted to install it on but no drives came up to select.
    So i followed the advice from another forum, look at the 'Extended Hard-drive preparation' response
    ( https://discussions.apple.com/message/10576009#10576009 )
    After following these instructions i have now got a new partition, but when i restarted my computer to install SL on the drive, the option to boot from the drive is now not available, now i must boot from the install disk, whereas before i was able to boot from either the install disk or the hard drive. The hard drive is still visible in disk utility as it always has been, but i am now unable to boot from it, let alone install SL.
    Please help my iMac has been broken for months and i've been trying to fix it for so long and am getting problem after problem. Thank you!
    <div class="mcePaste" id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" mcestyle="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;"></div>

    Hi db2
    That off the shelf MS-DOS / FAT-32 drive needs to re-partitioned GUID Partition Table / Mac OS Extended (Journaled) before you can install OS X and Startup your Intel iMac from it.
    1. Boot from your original install or retail SL DVD and open Disk Utility.
    2. Highlight the new HD in the list of drives and select the Partition tab.
    3. Under Volume Scheme select 1 Partition and click on the Options... button.
    4. Select GUID Partition Table in the drop down window and click OK.
    5. Set the Format to Mac OS Extended (Journaled) and click the Apply button.
    6. Once thats done, then you can do a clean SL Install, Restore from TM , your old HD or  Bootable Clone.
    Dennis

  • Ran DiskUtility on Bootcamp partition, now windows cant boot

    I installed Windows 7 Ultimate on my MBPr and it was booting fine several times.
    I noticed yesterday the bootcamp partition was no longer showing System Preferences -> Startup Disk
    I could still get Windows 7 to boot if I did a restart on Mac OSX 10.7.4, held down the Option button during startup, then I was given the Bootcamp partition as a choice.
    I went back into Mac OSX, and tried running Disk Utility to verify and then repair the Boot Camp partition. It thought it found all kinds of errors and claimed to fix them. I let it very and fix the main root drive (my entire hard drive) and it claimed tor repair the boot paritions.
    Bootcamp still not showing in System Preferences -> Startup Disk
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    I guess it is was silly to expect the Mac Disk Utility to properly repair a windows drive. But if it can't do this, the option shouldnt have been offered!
    So I guess its time to erase the Bootcamp partition and start over.  Good thing I didn't install anything important in Windows, other than all the updates.

    The option won't be there unless you added a 3rd party NTFS driver that is suppose to add NTFS write support.
    And that driver is why Windows didn't show in Startup Disk (which does happen too on its own and is totally benign)
    If you want to repair Windows, use chkdsk and/or the Windows 7 DVD you have. Not Lion DU.
    You dont' erase NTFS in DU either. you can format it in Windows 7 DVD, yes, just like you did originally.
    And when you get it running, make backup system image(s) with WinClone 3 (in OS X, to an external hard drive - not to your Mac boot volume)
    http://www.twocanoes.com/
    if you are going to use and need to write to NTFS, the only one current and work best today
    http://www.paragon-software.com/home/ntfs-mac/

  • Resized partition, now can only boot using option key

    I made my boot camp partition larger and my os x partition smaller using a 3rd party program. I can still boot into windows, but only using the option key. When I look at my startup disks in OS X, only my OSX partition shows up. Is there any way to make snow leopard recognize this resized partition? Thanks!

    Hi,
    I am not familiar with that program but since it is a Windows program I doubt that it has installed anything in OSX.
    Most likely that program wasn't even "aware" that it was used on a Mac running WIndows.
    And it also might be that that is the reason for your problem.
    To run Windows with BootCamp on a Mac OSX has to establish/use a form of hybrid GPT/MBR partitioning.
    GPT for OSX and MBR for Windows.
    That also means that using any kind pof partitioning tool (resizing etc.) would have to be done best in OSX since only OSX "knows" that there is a Windows partition and can handle the hybrid partitioning accordingly.
    First thing I would propose (if not already there) is a backup / clone of your OSX onto an external HD.
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  • What is the EFI boot option for mac, and why is my Mac having problems with it?

    I just updated my 2012 Macbook Pro to 10.9, and I am having some problems with it. I have a bootcamp partition on it and regularly awitch between mac and windows, and 2when I went to switch nack to my Mac side, It said EFI boot nstead of the regular Macintosh HD. When I choose that option, the aple logo comes up and progress bar appears. Once the progress bar finishes, the computer shuts off and doesnt do anything. When I turn it on again, it just starts the efi boot again and shuts off when it finishes. Why is this happening and what can I do to fix this. All help is extremely appreciated.

    That usually happen because the OS X partition got corrupted. Abiotu the only fix for that is to reinstall OS X and to do that you might have to completely erase the drive or repartition it as one partition. Which will wipe out the Windows side. So backup everthing you can before you start.
    nisuteng wrote:
    Hi, did you fix the problem?
    I have the same problem... and my warranty has expired...
    please help~~
    thanks!!

  • How To Make Mac Partition Main Boot Drive

    Hi. Whenever I boot my computer, it always boots into XP when you don't press option. What can I do so that the Mac partition is the main boot drive? Thanks.

    Hi,
    while in OSX open System Preference from the Apple Top Menu, then open Startup Volume and set your OSX volume as the default startup volume.
    Do the needed restart and voila
    regards
    Stefan

  • !!!!URGENT!!!! "EFI Boot" not starting up?!?!?!

    I recently tried to restore my startup disk using a time machine Back-up and my start disk is called "EFI Boot".
    When I start up my mac, instead of an apple logo and a spinning wheel under (loading) I get not wheel and flashing in a pattern an apple logo, a folder with a question mark and a stop sign thingy.
    When I press option at start-up, I tried to partition the disk and its still the same. From there, if I press start up disk it tells me there is no disk to strat up form.
    Any advices or fixes??
    Thanks sooo much

    You will need to format the harddrive in your mac, reinstall the os and then use migration assistant to get your items off the time machine.
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  • Urgent Help With MAC Partition

    Hello All,
    I am completely new to MAC so please forgive me if its a silly question.
    I recently  brought a MAC RMBP (Late 2014) model which has OSX Mavrick 10.9.5 installed.
    I managed to create a Bootcamp partition 120GB to install windows.
    I want to create another 2-3 partitions from the remaining 380GB space assigned on MAC side.
    The idea is to create separate logical volume for Data and Media and format them as FAT 32 inorder to be accessed by both OS.
    I understand that I can create a cloud based storage or use an external HDD to store large data. But I am interested in knowing if I can further partition my MAC drive to different logical volumes.
    I have actually used disk utility to sub-divide mac side into different drives, but now I can not boot with Windows.
    Thanks a lot for the help.

    Hi,
    I think its possible. How ever its not working for me.
    I followed the steps from the below thread:
    https://discussions.apple.com/thread/3293948?start=0&tstart=0
    How ever its still not working for me.
    Steps done:
    1) Removed Recovery Partition
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    3) Started Boot camp and created a windows Partition.
    4) Restarted PC before windows installation.
    5) Opened Disk utility and created a shared partition (Out of Mac partition).
    6) Formatted the new shared partition as FAT32.
    7) Restarted the computer and holding option key selected the bootcamp option.
    8) Windows installation starts but after a while I get a error message saying that its not able to detect the USB drive.
    Note:
    The USB drives with windows ISO and bootcamp driver (Both created using Bootcamp) are connected all the time.
    Can someone please suggest if I am doing anything wrong?

  • Accessing mac partition within vista

    How can I access my Mac partition when I'm booted into Vista? I am able to access my Vista partition when booted into Mac OS, but not the other way around? I've installed iTunes in both partitions and would like to access my music in the Mac partition. How can I do that? I'd also like to transfer my bookmarks to the Vista partition as well. Boot Camp works great on my system but I would like to access my Mac media files when booted into Vista.

    UCorvet wrote:
    Thanks hatter. I just downloaded HFSExplore. It's simple, easy to use and saves 50 bucks (MacDrive7).
    It's also safer, being read only.
    Writing to the HFS+ volume from Windows can prove disastrous if not done properly

  • HT1237 EFI Boot off USB.

    Why isn't  iMac 8,1 (Model identifier) in the list of firmware updates for EFI boot?

    Sort of. Not sure if I'm missing something on my Mac or if there is an issue with the EFI boot USB memory stick.
    When I power on and hold down the Options key, my MAC recognizes the USB EFI boot device and gives me the option to boot from USB or Hard Drive.
    When I select EFI boot, it freezes and does nothing (or it is extremely slow booting).

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    Hi I was on my windows side of my mac when i got the blue-screen-of-death with something saying Critical Kernel Error, weird noises from the speakers and the macbook pro did a hard shut off.
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  • New Hard Drive, Mac partition cloned and boots fine, but I can't seem to get my BOOTCAMP (windows) partition to boot!  Any ideas?

    Hello all!
    I got a new hard drive for my Mac Book Pro and an enclosure so I could clone the old partitions on to the new drive.
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    That's where I am at.  I have found other posts with people who are having the same problem, but I have yet to find a solution that doesn't involve me buying some 3rd party software.  I know it has something to do with (what is called in Microsoft world) the Master Boot Record, but I don't know how to modify that to reflect that the BOOTCAMP partition is a bootable logical drive.  I remember in MS DOS land there was some command line FDSK /something command that you would run (I think it was /MBR) to reset the MBR.  To me though, all of these terms are shadowy figures in the Ether.
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    I got it. It CAN be done. At least on 10.6
    How I made it happen (for free) on Snow Leopard:
    1) partition, dupe etc all that jazz that you know. Make the mac side work, which it seems we've all been able to do no issues. I used SuperDuper! It worked just fine. (Had it on a disk. I assume you could use any other free way of doing this.)
    2) New hard drive running, I used bootcamp assistant to partition the new drive for a new Bootcamp. I don't know if it's necessary to make the new partition this way for some reason, but it's what the process ultimately included, so maybe try without, but it worked with.
    3) Natively running original drive on the windows side. Used DirveImage XML to clone windows partition onto new drive connected externally.
    4) Back on new hard drive running natively. (Sorry for all the switching.) You'll note that the new Bootcamp partition is NOT bootable at this point. It won't come up in the usual 'alt on startup' boot menu.
    Download rEFInd and install on mac side. Technically this is freeware or w/e, but for the love of god, throw money at this man. He totally deserves it.
    5) Restarting the computer, rEFInd's boot manager finally recognizes windows. But you'll find windows is a little messed up and still won't quite boot. Get out your Windows CD and pop it in. Do the 'alt boot' thing. Your boot menu options are now "EFI Manager," "Bootcamp," and "Windows Disk." Or some such. Holy Crap! It recognizes Windows!
    6) Boot to the CD and tell it to repair the windows volume. It will. My computer also had to do a disk check next time I booted to Windows, which took for-stupid-ever, but eventually worked. (I went to bed in between.)
    7) Everything is running smoothly. Plus, you get the rEFInd boot manager, which is also great.
    Deets: I have a late 2010 MBP 13". Snow leopard/Windows 7 32-bit (long story) Moved from original 320GB seagate momentus to new 750GB Seagate Momentus XT.
    Feel free to share/copy&paste this solution as you see useful. Cheers!

  • Can't boot into Windows after splitting Mac partition with Disk Utility

    Hi everyone,
    I installed Windows 8 with BOOTCAMP, creating a large 871 GB partition with a smaller 127 GB partition for Windows. After installing Windows, I then went back to Disk Utility to shrink the Mac partition and add two new partitions, one for storage and another blank, hoping to use it to install Linux into one day.
    I did that, and now Windows doesn't boot. A Windows blue screen tells me I need to use the Windows DVD to repair it.
    I tried to use Disk Utility to delete the two new partitions I made and grow the Mac partition back to the max size of 871 GB. But it doesn't let me do this. The Disk Utility log doesn't report an error and thinks it worked but the partition stays the same size. However if I make the partition a little smaller, like 870 GB then it works. I'm wondering if the Recovery partition is hiding there and preventing me from fully expanding the Mac partition.
    What can I do?
    Here's what I get if I type in sudo gpt -r -vv show disk0:
    Code: 
    gpt show: disk0: mediasize=1000204886016; sectorsize=512; blocks=1953525168 gpt show: disk0: Suspicious MBR at sector 0 gpt show: disk0: Pri GPT at sector 1 gpt show: disk0: Sec GPT at sector 1953525167 start        size  index  contents 0           1         MBR 1           1         Pri GPT header 2          32         Pri GPT table 34           6 40      409600      1  GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B 409640  1701278816      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC 1701688456     1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC 1702957992     1846360 1704804352   248002560      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 1952806912      718223 1953525135          32         Sec GPT table 1953525167           1         Sec GPT header
    Here's what I get if I type sudo fdisk /dev/rdisk0:
    Code: 
    Disk: /dev/rdisk0     geometry: 121601/255/63 [1953525168 sectors] Signature: 0xAA55 Starting       Ending #: id  cyl  hd sec -  cyl  hd sec [     start -       size] ------------------------------------------------------------------------ 1: EE 1023 254  63 - 1023 254  63 [         1 -     409639] <Unknown ID> 2: AF 1023 254  63 - 1023 254  63 [    409640 - 1701278816] HFS+ 3: AB 1023 254  63 - 1023 254  63 [1701688456 -    1269536] Darwin Boot *4: 07 1023 254  63 - 1023 254  63 [1704804352 -  248002560] HPFS/QNX/AUX
    Here's what I get with gdisk:
    Code: 
    Disk /dev/rdisk0: 1953525168 sectors, 931.5 GiB Logical sector size: 512 bytes Disk identifier (GUID): 6075110F-7CEF-4604-85EE-6231B850E2AE Partition table holds up to 128 entries First usable sector is 34, last usable sector is 1953525134 Partitions will be aligned on 8-sector boundaries Total free space is 2564589 sectors (1.2 GiB)  Number  Start (sector)    End (sector)  Size       Code  Name 1              40          409639   200.0 MiB   EF00  EFI System Partition 2          409640      1701688455   811.2 GiB   AF00  1 TB APPLE HDD HTS54101 3      1701688456      1702957991   619.9 MiB   AB00  Recovery HD 4      1704804352      1952806911   118.3 GiB   0700  BOOTCAMP

    Okay, the code I typed didn't display properly in the forum. Let me try again.
    Here's what I get when I type
    sudo gpt -r -vv show disk0:
    gpt show: disk0: mediasize=1000204886016; sectorsize=512; blocks=1953525168
    gpt show: disk0: Suspicious MBR at sector 0
    gpt show: disk0: Pri GPT at sector 1
    gpt show: disk0: Sec GPT at sector 1953525167
           start        size  index  contents
               0           1         MBR
               1           1         Pri GPT header
               2          32         Pri GPT table
              34           6        
              40      409600      1  GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
          409640  1701278816      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC
      1701688456     1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
      1702957992     1846360        
      1704804352   248002560      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
      1952806912      718223        
      1953525135          32         Sec GPT table
      1953525167           1         Sec GPT header
    And when I type fdisk /dev/rdisk0 I get:
    Disk: /dev/rdisk0          geometry: 121601/255/63 [1953525168 sectors]
    Signature: 0xAA55
             Starting       Ending
    #: id  cyl  hd sec -  cyl  hd sec [     start -       size]
    1: EE 1023 254  63 - 1023 254  63 [         1 -     409639] <Unknown ID>
    2: AF 1023 254  63 - 1023 254  63 [    409640 - 1701278816] HFS+       
    3: AB 1023 254  63 - 1023 254  63 [1701688456 -    1269536] Darwin Boot
    *4: 07 1023 254  63 - 1023 254  63 [1704804352 -  248002560] HPFS/QNX/AUX
    Kappy,
    I can boot into OS X just fine so if possible, I'd like to avoid reformatting everything. If you know of a way I can add more than 2 partitions with OS X and Boot Camp, please let me know. As far as I know, rEFInd can recognize more than two partitions, but I don't think it can edit partitions on a GPT / hybrid MBR system. Or am I wrong?

  • Can't boot into Mac Partition

    I started out with a simple error in iTunes whenever I tried to update my genius. The error was the following:
    "We could not complete your iTunes Store request. An unknown error occured (-9812). There was an error in the iTunes Store. Please try again later."
    I read on apples support page http://support.apple.com/kb/TS3222 that I needed to delete my VeriSign certificates. However, there were no certificates in the "login" section of my keychain, only in the "system root" section. I tried to delete the root Verisign Certificates but couldn't.
    Next I read that I could clear my cache and that would help, so I cleared my system cache and deleted my cookies in Safari. Didn't help.
    So I reset my login keychain several times and nothing happened. I decided to restart my computer, and I was able to access the login screen. However, when I entered my username and password they didn't work so I couldn't log into my account.
    Since I have a windows partition, I booted up into windows and downloaded a program called MacDrive 8. I looked in my keychain folder under /Users/username/Library/Keychains and discovered that I had several "login.keychain" files. The first was named "login.keychain", the others were named "loginrenamed1.keychain", "loginrenamed2.keychain", and "loginrenamed3.keychain".
    Other files in the folder were "MicrosoftIntermediateCertificates" and ".fl62323D2F" and ".flA6A9AF81" in case you needed to know.
    I decided to copy the three "loginrenamed#.keychains" to my desktop (and remove them from the keychain folder) and then reboot. This is where my major problem started. I received an error on the white screen with the apple logo on it. It said "You need to restart your computer. Hold down the Power button until it turns off, then press the Power button again". I did and it came up with the same error.
    I logged back into the windows partition (by holding down "option" at the startup screen and selecting my windows drive) and put the renamed keychains back in their original folder. However, when I rebooted onto mac partition I get the same error at the startup screen, even though I placed the renamed keychain files back into their original folder.
    This is the error:
    npvhash=4095
    PAE enabled
    64 bit mode enabled
    Darwin Kernal Version 10.4.0: Fri Apr 23 18:28:53 PDT 2010; root:xnu-1504.7.4~1/RELEASE_I386
    vmpagebootstrap: 906786 free pages and 7625 wired pages
    standard timeslicing quantum is 10000 us
    migtable_maxdispl = 73
    Kext com.apple.driver.AppleACPIPlatform - library kext com.apple.kpi.mach not found
    Can't load kext com.apple.driver.AppleACPIPlatform - failed to resolve library dependencies
    Kext com.apple.driver.AppleACPIPlatform failed to load (0xdc00800e).
    Failed to load kext com.apple.driver.AppleACPIPlatform (error 0xcd00800e).
    Couldn't alloc class "AppleACPIPlatformExpert"
    panic(cpu 0 caller 0x5591db): "Unable to find driver for this platform: \"ACPI\".\n"@/SourceCache/xnu/xnu-1504.7.4/iokit/Kernal/IOPlatformExpert.cpp:13 89
    Debugger called: <panic>
    Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)
    0x509cbda8 : 0x21b455 (0x5cf328 0x509cbddc 0x2238b1 0x0)
    0x509cbdf8 : 0x5591db (0x5d8c04 0x6a0f4d0 0x509cbe28 0x6a84f80)
    0x509cbe18 : 0x538e50 (px6b8c180 0x6a75d80 0x1 0x4c1e6)
    0x509cbe78 : 0x537085 (0x6a75d80 0x6b8c180 0x6b66a80 0x5000ae)
    0x509cbf28 : 0x537616 (0x6a75d80 0x6a7c6c0 0x8 0xffffffff)
    0x509cbf78 : 0x5392c5 (0x6a75d80 0x0 0x509cbfac 0x1
    0x509cbfc8 : 0x29e6cc (0x6b4b2b0 0x0 0xffffffff 0xffffffff)
    BSD process name corresponding to current thread: Unknown
    Mac OS version:
    Not yet set
    Kernal version:
    Darwin Kernal Version 10.4.0: Fri Apr 23 18:28:53 PDT 2010; root:xnu-1504.7.4~1/RELEASE_I386
    System uptime in nanoseconds: 121162823
    I recently found out all that I should have entered my Snow Leopard DVD and reset the password on my account. However, since I heard about this after this error occurred, when I try to reset my password it say there are no users on my Macintosh HD to reset the password for.
    On the disk I tried disk recovery, but at the end of the recovery process it said that the disk couldn't be repaired and that I needed to back up my data and reinstall the OS.
    I realized in the error that there is a missing kext file. Is it possible to download this file and place it in its right location on the hard drive?
    Any help would be greatly appreciated!

    kevinature wrote:
    On the disk I tried disk recovery, but at the end of the recovery process it said that the disk couldn't be repaired and that I needed to back up my data and reinstall the OS.
    And this is what you need to do, except the message almost certainly said to reformat the volume, not just to reinstall the OS. All the other stuff you did somehow damaged the file system of the Mac partition, so replacing a missing kext file will not help.

  • After install of Mavericks, it looks like my system kernal panics and just sits there. I tried waiting over two nights. Tried reinstalling twice, booting r/s. Recovery partition now has Mavericks as OS. Im running a iMac i3 27 inch circa 2011. Any ideas?

    After install of Mavericks, it looks like my system kernal panics and just sits there. I tried waiting over two nights. Tried reinstalling twice, booting ro the repair partition and repairs permissions/drive/verify , with no problems. Tried reseting PVRAM(or whateverit called). Recovery partition now has Mavericks as OS. Im running a iMac i3 27 inch circa 2011. Any ideas? Can still bootcamp into windows.
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    bhadotia wrote:Anyway's the file downloaded from dell to update the partition for Studio 1555 is corrupted (checksums don't match). My partition still doesn't boot. I'm working to fix this and will update my post when I'm done.
    The file seems to create the CD/DVD/Image and USB just fine. So I used this only to create a CD image which I then wrote on a blank CD which seems to work fine. Also, I played around a bit and had some partial success in booting the partition. I've updated my original opening post with the new findings.
    Whew!! what a waste of time! Never want to do all of this again .
    Last edited by bhadotia (2012-03-03 00:05:22)

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