boomdeyada
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Q: Can't boot into Bootcamp/deleted EFI file

I deleted my EFI files/partition and couldn't start in Bootcamp. I was able to make a new EFI partition, but I still can't start in Bootcamp. I see it as a startup disk in System Preferences, it shows up as a device in Finder, but I don't see it when I use the OPTION key to start my computer.

 

When I run diskutil list, this is what I get:

/dev/disk0 (internal, physical):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                        *750.2 GB   disk0

   1:                        EFI EFI                     209.7 MB   disk0s1

   2:                  Apple_HFS Macintosh HD            449.3 GB   disk0s2

   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

   4:       Microsoft Basic Data BOOTCAMP                300.0 GB   disk0s4

 

When I run sudo gpt -vv -r show /dev/disk0, I get:

gpt show: /dev/disk0: mediasize=750156374016; sectorsize=512; blocks=1465149168

gpt show: /dev/disk0: PMBR at sector 0

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

gpt show: /dev/disk0: Sec GPT at sector 1465149167

       start        size  index  contents

           0           1         PMBR

           1           1         Pri GPT header

           2          32         Pri GPT table

          34           6        

          40      409600      1  GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B

      409640   877533368      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC

   877943008     1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

   879212544   585934848      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

  1465147392        1743        

  1465149135          32         Sec GPT table

  1465149167           1         Sec GPT header

 

When I run sudo fdisk /dev/disk0, I get this:

Disk: /dev/disk0    geometry: 91201/255/63 [1465149168 sectors]

Signature: 0xAA55

         Starting       Ending

#: id  cyl  hd sec -  cyl  hd sec [     start -       size]

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

1: EE 1023 254  63 - 1023 254  63 [         1 - 1465149167] <Unknown ID>

2: 00    0   0   0 -    0   0   0 [         0 -          0] unused     

3: 00    0   0   0 -    0   0   0 [         0 -          0] unused     

4: 00    0   0   0 -    0   0   0 [         0 -          0] unused

 

Is there any way I can fix this, or do I have to destroy my Bootcamp partition and start from scratch?

MacBook Pro, OS X El Capitan (10.11.1)

Posted on Nov 9, 2015 11:35 AM

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boomdeyada

Q: Can't boot into Bootcamp/deleted EFI file

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  • by Loner T,

    Loner T Loner T Nov 9, 2015 1:59 PM in response to boomdeyada
    Level 7 (24,738 points)
    Safari
    Nov 9, 2015 1:59 PM in response to boomdeyada

    Please post the output of

     

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

  • by boomdeyada,

    boomdeyada boomdeyada Nov 9, 2015 2:02 PM in response to Loner T
    Level 1 (0 points)
    Nov 9, 2015 2:02 PM in response to Loner T

    This is the result I got:

     

    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 67 34  |........?.....g4|

    00000020  00 00 00 00 80 00 80 00  ff a7 ec 22 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  d1 57 5a a6 6b 5a a6 ca  |.........WZ.kZ..|

    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 70 0e 16  68 09 00 66 53 66 53 66  |h...hp..h..fSfSf|

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

    00000110  28 10 b9 d8 0f fc f3 aa  e9 5f 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 a0 f8 01 e8 09 00  |...u...fa.......|

    00000170  a0 fb 01 e8 03 00 f4 eb  fd b4 01 8b f0 ac 3c 00  |..............<.|

    00000180  74 09 b4 0e bb 07 00 cd  10 eb f2 c3 0d 0a 41 20  |t.............A |

    00000190  64 69 73 6b 20 72 65 61  64 20 65 72 72 6f 72 20  |disk read error |

    000001a0  6f 63 63 75 72 72 65 64  00 0d 0a 42 4f 4f 54 4d  |occurred...BOOTM|

    000001b0  47 52 20 69 73 20 6d 69  73 73 69 6e 67 00 0d 0a  |GR is missing...|

    000001c0  42 4f 4f 54 4d 47 52 20  69 73 20 63 6f 6d 70 72  |BOOTMGR is compr|

    000001d0  65 73 73 65 64 00 0d 0a  50 72 65 73 73 20 43 74  |essed...Press Ct|

    000001e0  72 6c 2b 41 6c 74 2b 44  65 6c 20 74 6f 20 72 65  |rl+Alt+Del to re|

    000001f0  73 74 61 72 74 0d 0a 00  8c a9 be d6 00 00 55 aa  |start.........U.|

  • by Loner T,

    Loner T Loner T Nov 9, 2015 3:07 PM in response to boomdeyada
    Level 7 (24,738 points)
    Safari
    Nov 9, 2015 3:07 PM in response to boomdeyada

    In Finder, do you see all your Windows files in the Bootcamp volume?

  • by boomdeyada,

    boomdeyada boomdeyada Nov 9, 2015 4:06 PM in response to Loner T
    Level 1 (0 points)
    Nov 9, 2015 4:06 PM in response to Loner T

    Yes, I can access my Windows files on Bootcamp via Finder (and open them).

  • by Loner T,

    Loner T Loner T Nov 9, 2015 4:15 PM in response to boomdeyada
    Level 7 (24,738 points)
    Safari
    Nov 9, 2015 4:15 PM in response to boomdeyada

    You need to disable System Integrity Protection.

     

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

    2. Run csrutil status.

    3. Run csrutil disable.

    4. Run csrutil status.

    5. Boot normally.

    6. Run csrutil status and confirm that it matches step 4 output.

    7. Run the following Gdisk steps.

     

    Please download GPT Fdisk from http://sourceforge.net/projects/gptfdisk/ and install it. It should be version 1.0.1.

     

    Rebuild MBR to match the new GPT information thus resetting the Hybrid MBR. Use defaults for other questions (like partition codes). The only values that need modifications are the Boot flags and step 10. Accept all other defaults that Gdisk offers. Please see the sample Q&A as an example. These steps can be repeated if you make a mistake before you get to Step 12, otherwise start from Step 1 for these steps. Step 6 has numbers which are typed with a space between the numbers. Please see the sample Q&A before you execute these steps.

    1. Sudo gdisk /dev/rdisk0
    2. P  (Print list of parts)
    3. R  (Recover)
    4. O (print current Hybrid MBR)
    5. H (chooses Hybrid)
    6. Partitions numbers to be hybridized: 2 3 4
    7. Y  (Good for GRUB question)
    8. N  (part 2 boot flag)
    9. N  (part 3 boot flag)
    10. Y  (part 4 boot flag make NTFS bootable partition)
    11. O  (print current Hybrid MBR)
    12. W (Write the new MBR)
    13. Y (Yes! write the new MBR)
    14. Reboot

     

    Here is sample Q&A for this section. Please notice the Press Enter/Return.

     

    Place EFI GPT (0xEE) partition first in MBR (good for GRUB)? (Y/N): Y

     

    Creating entry for GPT partition #2 (MBR partition #2)

    Enter an MBR hex code (default AF): Press Enter/Return

    Set the bootable flag? (Y/N): N

     

    Creating entry for GPT partition #3 (MBR partition #3)

    Enter an MBR hex code (default AB): Press Enter/Return

    Set the bootable flag? (Y/N): N

     

    Creating entry for GPT partition #4 (MBR partition #4)

    Enter an MBR hex code (default 07): Press Enter/Return

    Set the bootable flag? (Y/N): Y

     

    Test 1 - Does Bootcamp Volume show up in Finder?

    Test 2 - Can you see files in Bootcamp Volume?

    Test 3 - Can you select Bootcamp in System Preferences -> Startup Disk?

    Test 4 - If Test 3 is successful, select Bootcamp and Click Restart.

  • by boomdeyada,

    boomdeyada boomdeyada Dec 3, 2015 5:56 PM in response to Loner T
    Level 1 (0 points)
    Dec 3, 2015 5:56 PM in response to Loner T

    Loner T,


    Sorry for the late, late response, and thanks for your help! The Bootcamp volume shows up in Finder and I can see files in the Bootcamp volume. I can select Bootcamp in System Preferences -> Startup Disk. However, I still have a problem: when I restart the computer, it doesn't actually go into Bootcamp and instead goes back to OS X. However, if I start my computer and hold the option click, I am able to select Bootcamp and start it that way.

     

    Why doesn't my computer start in Bootcamp even though I select it as the startup disk in System Preferences? Do you know how to fix this?

  • by Loner T,

    Loner T Loner T Dec 3, 2015 6:52 PM in response to boomdeyada
    Level 7 (24,738 points)
    Safari
    Dec 3, 2015 6:52 PM in response to boomdeyada

    Can you look at Boot Camp: Set the default operating system and test the steps to check if it works the way you want it to?

  • by boomdeyada,

    boomdeyada boomdeyada Dec 5, 2015 11:37 AM in response to Loner T
    Level 1 (0 points)
    Dec 5, 2015 11:37 AM in response to Loner T

    When I click on Bootcamp Control Panel, the only tabs I see are for "Trackpad" and "Keyboard". Am I missing something...?

  • by Loner T,

    Loner T Loner T Dec 5, 2015 11:54 AM in response to boomdeyada
    Level 7 (24,738 points)
    Safari
    Dec 5, 2015 11:54 AM in response to boomdeyada

    Do you see something like this? Notice the tabs.

     

    Bootcamp-W8.1-Keyboard-ControlPanel.PNG

  • by boomdeyada,

    boomdeyada boomdeyada Dec 5, 2015 5:53 PM in response to Loner T
    Level 1 (0 points)
    Dec 5, 2015 5:53 PM in response to Loner T

    No. Like I said before, I only see Trackpad and Keyboard.

     

    Bootcamp_control_panel.png

     

    edit: Spelling.

  • by Loner T,

    Loner T Loner T Dec 5, 2015 6:37 PM in response to boomdeyada
    Level 7 (24,738 points)
    Safari
    Dec 5, 2015 6:37 PM in response to boomdeyada

    In Administrator Tools -> Services, do you see any Apple services installed? If not, can you download BC drivers for your specific year/model and Windows version, and run the setup.exe in Bootcamp folder to repair BC drivers.

     

    It would be good to know your Mac year/model and Windows version.

  • by boomdeyada,

    boomdeyada boomdeyada Jan 23, 2016 9:52 AM in response to Loner T
    Level 1 (0 points)
    Jan 23, 2016 9:52 AM in response to Loner T

    Yes, I see "Apple OS Switch Manager" when I look at Administrator Tools -> Services.

     

    I have a 13" MacBook Pro, late 2011 version, and I am running Windows 6 64-bit on Bootcamp. Please tell me if you need any other specs, and my apologies for a late reply!

     

    Edited to add: Also, I did run setup.exe and that didn't add any tabs to my Bootcamp menu.

  • by Loner T,

    Loner T Loner T Jan 23, 2016 9:58 AM in response to boomdeyada
    Level 7 (24,738 points)
    Safari
    Jan 23, 2016 9:58 AM in response to boomdeyada

    I will assume you meant W7 64-bit. In Control Panel -> System -> Boot Camp, if you have Restart in OS X or a similar item in System Tray, use it.

     

    Can you run a SMC/NVRAM Reset

     

    Resetting the System Management Controller (SMC) on your Mac - Apple Support

    How to Reset NVRAM on your Mac - Apple Support

     

    and test? Do you have any third-party NTFS software?

  • by boomdeyada,

    boomdeyada boomdeyada Jan 23, 2016 10:03 AM in response to Loner T
    Level 1 (0 points)
    Jan 23, 2016 10:03 AM in response to Loner T

    Whoops, sorry about that: yes, I meant W7 64-bit.

     

    I'll reset the SMC and NVRAM reset. I don't think I have any third-party NTFS software. Do you have any examples?

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