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Disk utility repair made Bootcamp partition innacessable.

My MBP running 10.9.5 was having issues starting up. I booted into recovery and used Disk Utility to repair my disk. Can boot into OS X just fine now, but when I hold alt/ option to get boot options for Bootcamp, Windows partition no longer is available.


When I boot into OS X I can see my partition and access the files, I'm guessing Disk Utility removed the boot partition or some such thing.


Any help would be appreciated!

MacBook Pro, OS X Mavericks (10.9.5), Bootcamp with Windows 7

Posted on Dec 8, 2015 10:02 AM

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20 replies

Dec 8, 2015 10:22 AM in response to arrwhieayen

Can you post the output of the following 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.

Dec 8, 2015 3:00 PM in response to arrwhieayen

If this disk was part of another system or had OS X on a different disk, that may explain Recovery HD missing from this disk. Usually in step 6, there are three numbers. The missing Recovery means you have only 2, which are GPT2 and GPT3 respectively.

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 thesample 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
  7. Y (Good for GRUB question)
  8. N (part 2 boot flag)
  9. Y (part 3 boot flag make NTFS bootable partition)
  10. O (print current Hybrid MBR)
  11. W (Write the new MBR)
  12. Y (Yes! write the new MBR)
  13. 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 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.

Disk utility repair made Bootcamp partition innacessable.

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