MurphyTheTurtle
Level 1 (0 points)

Q: Tried to Change Bootcamp Partition, Now I Cannot Load Windows.

Hi,

 

After attempting to change my Bootcamp partition, I am no longer able to boot into Windows. If I restart and hold option, I only get the Mac Disc. However, I can still find the contents of my Windows Disc in finder. Can someone please explain how I can get it back?

 

I have a Mac running OS X El Capitan 10.11.2. I'm not sure what other information is needed, so please tell me and I can respond. Thank you so much.

MacBook Pro, OS X El Capitan (10.11.2)

Posted on Jan 2, 2016 7:44 PM

by Loner T,Solvedanswer
Loner T Loner T
Level 7 (24,728 points)
Safari
A:

Step A - Disable El Capitan temporarily (About System Integrity Protection on your Mac - Apple Support)

 

1. Boot into Local Recovery (Command+R).

2. Start Utilities -> Terminal.

3. Type csrutil disable in Terminal and press Enter/Return.

4. Type csrutil status.

5. Boot normally, and type csrutil status to confirm that all individual entries are still disabled.

 

Step B - Mark Windows MBR as bootable.

 

In OSX Terminal, run the following commands. Please ignore the i386 MBR error message, but not any others. The first command puts you inside the Fdisk utility. The subsequent commands are Fdisk commands (till you enter 'q').

 

sudo fdisk -e /dev/disk0

p

setpid 4

07

flag 4

p

w

y

q

 

Reboot and test. Re-enable SIP, once you have everything working, using Step A and csrutil enable.

Posted on Jan 2, 2016 9:34 PM

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MurphyTheTurtle

Q: Tried to Change Bootcamp Partition, Now I Cannot Load Windows.

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  • Helpful answers

  • by Loner T,

    Loner T Loner T Jan 2, 2016 7:51 PM in response to MurphyTheTurtle
    Level 7 (24,728 points)
    Safari
    Jan 2, 2016 7:51 PM in response to MurphyTheTurtle

    What changes did you make to the BC partition? Can you post the output of the following OS X Terminal commands?

     

    diskutil list

    diskutil cs list

    sudo gpt -vv -r show /dev/disk0

    sudo fdisk /dev/disk0

     

    The "sudo" commands will prompt for your password, and it will not be echoed back. You may also see a warning about improper use of "sudo" and potential data loss due to "abuse" of the command.

  • by MurphyTheTurtle,

    MurphyTheTurtle MurphyTheTurtle Jan 2, 2016 7:58 PM in response to Loner T
    Level 1 (0 points)
    Jan 2, 2016 7:58 PM in response to Loner T

    I tried to increase the size of the BC partition, but I ended up creating a separate partition, which I have since gotten rid of. The BC partition is still the same.

     

    Here are the outputs:

     

    diskutil list:

    /dev/disk0 (internal, physical):

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:      GUID_partition_scheme                        *500.1 GB   disk0

       1:                        EFI EFI                     209.7 MB   disk0s1

       2:          Apple_CoreStorage Macintosh HD            467.2 GB   disk0s2

       3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

       4:       Microsoft Basic Data BOOTCAMP                32.0 GB    disk0s4

    /dev/disk1 (internal, virtual):

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                  Apple_HFS Macintosh HD           +466.9 GB   disk1

                                     Logical Volume on disk0s2

                                     D6B48E60-2925-455C-B09B-A04D248567AA

                                     Unencrypted

    /dev/disk2 (external, physical):

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:     FDisk_partition_scheme                        *16.1 GB    disk2

       1:                 DOS_FAT_32 WININSTALL              16.1 GB    disk2s1

     

    diskutil cs list:

    CoreStorage logical volume groups (1 found)

    |

    +-- Logical Volume Group 1DDB0242-6DCE-44F3-9E28-6F29C5866E27

        =========================================================

        Name:         Macintosh HD

        Status:       Online

        Size:         467248705536 B (467.2 GB)

        Free Space:   18972672 B (19.0 MB)

        |

        +-< Physical Volume 3F740DD8-04E7-41AE-B376-AFE1A0805F22

        |   ----------------------------------------------------

        |   Index:    0

        |   Disk:     disk0s2

        |   Status:   Online

        |   Size:     467248705536 B (467.2 GB)

        |

        +-> Logical Volume Family 1BCEC354-C710-4E78-85A2-4F76FD573F78

            ----------------------------------------------------------

            Encryption Type:         None

            |

            +-> Logical Volume D6B48E60-2925-455C-B09B-A04D248567AA

                ---------------------------------------------------

                Disk:                  disk1

                Status:                Online

                Size (Total):          466877411328 B (466.9 GB)

                Revertible:            Yes (no decryption required)

                LV Name:               Macintosh HD

                Volume Name:           Macintosh HD

                Content Hint:          Apple_HFS

     

    sudo gpt -vv -r show /dev/disk0:

    gpt show: /dev/disk0: mediasize=500107862016; sectorsize=512; blocks=976773168

    gpt show: /dev/disk0: Suspicious MBR at sector 0

    gpt show: /dev/disk0: Pri GPT at sector 1

    gpt show: /dev/disk0: Sec GPT at sector 976773167

          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  912595128      2  GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

      913004768    1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

      914274304   62498816      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

      976773120         15        

      976773135         32         Sec GPT table

      976773167          1         Sec GPT header

     

    sudo fdisk /dev/disk0:

    Disk: /dev/disk0 geometry: 60801/255/63 [976773168 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: AC 1023 254  63 - 1023 254  63 [    409640 -  912595128] <Unknown ID>

    3: AB 1023 254  63 - 1023 254  63 [ 913004768 -    1269536] Darwin Boot

    4: 0C 1023 254  63 - 1023 254  63 [ 914274304 -   62498816] Win95 FAT32L

  • by Loner T,

    Loner T Loner T Jan 2, 2016 8:06 PM in response to MurphyTheTurtle
    Level 7 (24,728 points)
    Safari
    Jan 2, 2016 8:06 PM in response to MurphyTheTurtle

    Please post the output of

     

    sudo dd if=/dev/rdisk0s4 count=1 2>/dev/null | hexdump -C

  • by MurphyTheTurtle,

    MurphyTheTurtle MurphyTheTurtle Jan 2, 2016 8:09 PM in response to Loner T
    Level 1 (0 points)
    Jan 2, 2016 8:09 PM in response to Loner T

    Here:

     

     

    Sashas-MacBook-Pro:~ Sashathomas$ sudo dd if=/dev/rdisk0s4 count=1 2>/dev/null | hexdump -C

    Password:

    00000000  eb 52 90 4e 54 46 53 20  20 20 20 00 02 08 00 00  |.R.NTFS    .....|

    00000010  00 00 00 00 00 f8 00 00  3f 00 ff 00 00 b8 7e 36  |........?.....~6|

    00000020  00 00 00 00 80 00 80 00  ff a7 b9 03 00 00 00 00  |................|

    00000030  00 00 0c 00 00 00 00 00  02 00 00 00 00 00 00 00  |................|

    00000040  f6 00 00 00 01 00 00 00  2c 1d d0 a8 2a d0 a8 c4  |........,...*...|

    00000050  00 00 00 00 fa 33 c0 8e  d0 bc 00 7c fb 68 c0 07  |.....3.....|.h..|

    00000060  1f 1e 68 66 00 cb 88 16  0e 00 66 81 3e 03 00 4e  |..hf......f.>..N|

    00000070  54 46 53 75 15 b4 41 bb  aa 55 cd 13 72 0c 81 fb  |TFSu..A..U..r...|

    00000080  55 aa 75 06 f7 c1 01 00  75 03 e9 dd 00 1e 83 ec  |U.u.....u.......|

    00000090  18 68 1a 00 b4 48 8a 16  0e 00 8b f4 16 1f cd 13  |.h...H..........|

    000000a0  9f 83 c4 18 9e 58 1f 72  e1 3b 06 0b 00 75 db a3  |.....X.r.;...u..|

    000000b0  0f 00 c1 2e 0f 00 04 1e  5a 33 db b9 00 20 2b c8  |........Z3... +.|

    000000c0  66 ff 06 11 00 03 16 0f  00 8e c2 ff 06 16 00 e8  |f...............|

    000000d0  4b 00 2b c8 77 ef b8 00  bb cd 1a 66 23 c0 75 2d  |K.+.w......f#.u-|

    000000e0  66 81 fb 54 43 50 41 75  24 81 f9 02 01 72 1e 16  |f..TCPAu$....r..|

    000000f0  68 07 bb 16 68 52 11 16  68 09 00 66 53 66 53 66  |h...hR..h..fSfSf|

    00000100  55 16 16 16 68 b8 01 66  61 0e 07 cd 1a 33 c0 bf  |U...h..fa....3..|

    00000110  0a 13 b9 f6 0c fc f3 aa  e9 fe 01 90 90 66 60 1e  |.............f`.|

    00000120  06 66 a1 11 00 66 03 06  1c 00 1e 66 68 00 00 00  |.f...f.....fh...|

    00000130  00 66 50 06 53 68 01 00  68 10 00 b4 42 8a 16 0e  |.fP.Sh..h...B...|

    00000140  00 16 1f 8b f4 cd 13 66  59 5b 5a 66 59 66 59 1f  |.......fY[ZfYfY.|

    00000150  0f 82 16 00 66 ff 06 11  00 03 16 0f 00 8e c2 ff  |....f...........|

    00000160  0e 16 00 75 bc 07 1f 66  61 c3 a1 f6 01 e8 09 00  |...u...fa.......|

    00000170  a1 fa 01 e8 03 00 f4 eb  fd 8b f0 ac 3c 00 74 09  |............<.t.|

    00000180  b4 0e bb 07 00 cd 10 eb  f2 c3 0d 0a 41 20 64 69  |............A di|

    00000190  73 6b 20 72 65 61 64 20  65 72 72 6f 72 20 6f 63  |sk read error oc|

    000001a0  63 75 72 72 65 64 00 0d  0a 42 4f 4f 54 4d 47 52  |curred...BOOTMGR|

    000001b0  20 69 73 20 63 6f 6d 70  72 65 73 73 65 64 00 0d  | is compressed..|

    000001c0  0a 50 72 65 73 73 20 43  74 72 6c 2b 41 6c 74 2b  |.Press Ctrl+Alt+|

    000001d0  44 65 6c 20 74 6f 20 72  65 73 74 61 72 74 0d 0a  |Del to restart..|

    000001e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|

    000001f0  00 00 00 00 00 00 8a 01  a7 01 bf 01 00 00 55 aa  |..............U.|

    00000200

  • by Loner T,Solvedanswer

    Loner T Loner T Jan 2, 2016 9:34 PM in response to MurphyTheTurtle
    Level 7 (24,728 points)
    Safari
    Jan 2, 2016 9:34 PM in response to MurphyTheTurtle

    Step A - Disable El Capitan temporarily (About System Integrity Protection on your Mac - Apple Support)

     

    1. Boot into Local Recovery (Command+R).

    2. Start Utilities -> Terminal.

    3. Type csrutil disable in Terminal and press Enter/Return.

    4. Type csrutil status.

    5. Boot normally, and type csrutil status to confirm that all individual entries are still disabled.

     

    Step B - Mark Windows MBR as bootable.

     

    In OSX Terminal, run the following commands. Please ignore the i386 MBR error message, but not any others. The first command puts you inside the Fdisk utility. The subsequent commands are Fdisk commands (till you enter 'q').

     

    sudo fdisk -e /dev/disk0

    p

    setpid 4

    07

    flag 4

    p

    w

    y

    q

     

    Reboot and test. Re-enable SIP, once you have everything working, using Step A and csrutil enable.

  • by MurphyTheTurtle,

    MurphyTheTurtle MurphyTheTurtle Jan 2, 2016 8:24 PM in response to Loner T
    Level 1 (0 points)
    Jan 2, 2016 8:24 PM in response to Loner T

    Following you up until reboot and test. Restart Mac in the same disc or recovery mode?

  • by Loner T,

    Loner T Loner T Jan 2, 2016 8:26 PM in response to MurphyTheTurtle
    Level 7 (24,728 points)
    Safari
    Jan 2, 2016 8:26 PM in response to MurphyTheTurtle

    Restart normally and check OS X and Windows. If both work properly, then re-enable SIP.

  • by MurphyTheTurtle,

    MurphyTheTurtle MurphyTheTurtle Jan 2, 2016 9:35 PM in response to Loner T
    Level 1 (0 points)
    Jan 2, 2016 9:35 PM in response to Loner T

    Amazing. Everything is still on both drives, everything works. Cannot express how grateful I am. Thank you so much!

  • by Loner T,

    Loner T Loner T Jan 3, 2016 7:42 AM in response to MurphyTheTurtle
    Level 7 (24,728 points)
    Safari
    Jan 3, 2016 7:42 AM in response to MurphyTheTurtle

    Please backup OS X, Windows and create a Windows System Restore point.