Partitions are a mess, overwrote MBR, Can't multiboot OSX/Windows (Bootcamp/rEFit/EasyBCD?)

Discussion in 'Windows, Linux & Others on the Mac' started by darcygibbs, Jun 14, 2016.

  1. darcygibbs macrumors newbie

    darcygibbs

    Joined:
    Jun 14, 2016
    Location:
    Toronto, Canada
    #1
    I installed Windows 10 using Boot Camp from OSX 10.11.5 (El Capitan), everything went fine but I wasn't happy with having to hold alt/option every boot if I wanted to choose an OS. So using Windows I installed EasyBCD and installed the Vista+ BCD Bootloader, and then I realized I was stuck on Windows cause I seemed to do something wrong, as even pressing alt/option before wont get the Macintosh HD to show up, I had two options which both brought me to Windows (EFI Boot and Windows drive).

    So then I booted into internet recovery and installed OSX onto a third partition (to avoid losing data/overwriting system files), hoping it would bring me closer to restoring the MBR as El Capitan intended. I am now stuck on 10.8.5, however my 10.11.5 installation shows up on Startup Disk within the System Settings, and I can select the option to restart into that OS but it ends up just booting to Mountain Lion. I've ran disk checks and repairs on my drives from Disk Utility but that didn't get me anywhere and everything checked out fine.

    I tried installing 3rd party bootloaders, and the only one that seemed to get me closer was rEFit, I can now see the Recovery Partition (unbootable), Untitled (10.8.5 Bootable) and "Legacy OS" which has a Windows logo so I assume this is my Win10 installation but I can't boot into this either. Just get an error or it hangs on loading.

    Using rEFit's Partition Inspector I got the following information regarding my partitions...

    Code:
    *** Report for internal hard disk ***
    
    Current GPT partition table:
    #      Start LBA      End LBA  Type
    1             40       409639  EFI System (FAT)
    2         409640    963586359  Unknown
    3      963586360    964855895  Mac OS X Boot
    4      964855896   1377601127  Basic Data
    5     1377863272   1388654151  Mac OS X HFS+
    6     1388916296   1463879591  Mac OS X HFS+
    7     1463879592   1465149127  Mac OS X Boot
    
    Current MBR partition table:
    # A    Start LBA      End LBA  Type
    1              1       409639  ee  EFI Protective
    2         409640    963586359  ac  Apple RAID
    3      963586360    964855895  ab  Mac OS X Boot
    4      964855896   1377601127  0c  FAT32 (LBA)
    
    MBR contents:
    Boot Code: Unknown, but bootable
    
    Partition at LBA 40:
    Boot Code: None (Non-system disk message)
    File System: FAT32
    Listed in GPT as partition 1, type EFI System (FAT)
    
    Partition at LBA 409640:
    Boot Code: None
    File System: HFS Extended (HFS+)
    Listed in GPT as partition 2, type Unknown
    Listed in MBR as partition 2, type ac  Apple RAID
    
    Partition at LBA 963586360:
    Boot Code: None
    File System: HFS Extended (HFS+)
    Listed in GPT as partition 3, type Mac OS X Boot
    Listed in MBR as partition 3, type ab  Mac OS X Boot
    
    Partition at LBA 964855896:
    Boot Code: None
    File System: Unknown
    Listed in GPT as partition 4, type Basic Data
    Listed in MBR as partition 4, type 0c  FAT32 (LBA)
    
    Partition at LBA 1377863272:
    Boot Code: None
    File System: HFS Extended (HFS+)
    Listed in GPT as partition 5, type Mac OS X HFS+
    
    Partition at LBA 1388916296:
    Boot Code: None
    File System: HFS Extended (HFS+)
    Listed in GPT as partition 6, type Mac OS X HFS+
    
    Partition at LBA 1463879592:
    Boot Code: None
    File System: HFS Extended (HFS+)
    Listed in GPT as partition 7, type Mac OS X Boot
    All I want is to be able to dual-boot between OSX & Windows, and at this point I just want it to work so wouldn't mind holding alt/option each boot lol. Thanks in advance.
     
  2. ActionableMango macrumors 604

    ActionableMango

    Joined:
    Sep 21, 2010
    #2
    I don't know that anyone here can give you a safe path backward. At this point I would wipe it out and start over.

    If you have important files that are not backed up, then boot into ML, which should be able to access your files on the other partitions, and copy it to a external drive or something so that you can restore those files afterward.

    When starting over, there are several things you should keep in mind:
    • Boot camp created a hybrid GPT/MBR partitioned disk. This is a nonstandard, conflicting organization and many third party utilities don't recognize this setup. These utilities assume it is either GPT or MBR, and can really screw things up. I suspect this is what happened to you. It is way better to use 100% GPT if possible. It is not possible on all Mac hardware, but check threads for installing Windows in EFI mode...they will explain how to install Windows 10 EFI on a fully GPT partitioned drive instead of that hybrid GPT/MBR nonsense.
    • rEFIt is very old now and hasn't been updated in years. There are outstanding bugs that were never fixed. I would also avoid EasyBCD since it is PC-centric. Install rEFInd instead--reFInd is the way to go for Macs.
     

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