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User profile for user: EtsMacWindows
EtsMacWindows Author
User level: Level 1
8 points

Trouble with BootCamp partition even with or without Tuxera Ntfs

Hello. I am new here, and I want to address an issue with my bootcamp partition.


When I tried to boot to Windows on the Mac, it said that there is no bootable device found and it told me to restart after plugging one in. However, what's more troublesome is that the windows bootcamp partition is not present in the startup boot menu. I have also uninstalled Tuxera NTFS for Mac (which I suspected to be the cause) and now i still cannot get the bootcamp partition back. What can I do?


BTW, My mac is a 13 inch Mid-2010 MacBook Pro running MacOS High Sierra.

MacBook Pro

Posted on Aug 23, 2019 1:54 AM

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User profile for user: Loner T
Loner T
User level: Level 9
59,526 points

Posted on Aug 23, 2019 7:56 PM

Download and install GPT FDisk - https://sourceforge.net/projects/gptfdisk/ .

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 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


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User profile for user: Loner T
Loner T
User level: Level 9
59,526 points

Aug 23, 2019 7:56 PM in response to EtsMacWindows

Download and install GPT FDisk - https://sourceforge.net/projects/gptfdisk/ .

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 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


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User profile for user: EtsMacWindows
EtsMacWindows Author
User level: Level 1
8 points

Aug 23, 2019 7:12 PM in response to Loner T

gpt show: /dev/disk0: mediasize=320072933376; sectorsize=512; blocks=625142448


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 625142447


      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  310964408      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC


  311374048    1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC


  312643584  312498176      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7


  625141760        655         


  625142415         32         Sec GPT table


  625142447          1         Sec GPT headergpt show: /dev/disk0: mediasize=320072933376; sectorsize=512; blocks=625142448


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 625142447


      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  310964408      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC


  311374048    1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC


  312643584  312498176      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7


  625141760        655         


  625142415         32         Sec GPT table


  625142447          1         Sec GPT header

for the second one you mentioned:


Disk: /dev/disk0 geometry: 38913/255/63 [625142448 sectors]


Signature: 0xAA55


         Starting       Ending


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


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


 1: EE 1023 254  63 - 1023 254  63 [         1 -  625142447] <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    

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Trouble with BootCamp partition even with or without Tuxera Ntfs

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