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Bootcamp partition not working after resizing HD

I know this question has been asked earlier but analysis of every question seems different hence new thread.


I'm running Mac OS 10.10.5 and Windows 10 on my Macbook Pro 13(2012). Both the OS were working fine but it was difficult to share data between two, so I decided to create a exFat partition to have a common drive for sharing data between both OS. After that my Bootcamp drive is not showing up in startup menu, I tried to select bootcamp partition via startup disk in system preferences, but that doesn't work.

I'm posting outputs of show disk and fdisk command which might be required to understand my situation. Please help me with what to do next.

sudo gpt -r -vv show disk0

Password:

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

gpt show: disk0: Suspicious MBR at sector 0

gpt show: disk0: Pri GPT at sector 1

gpt show: 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 315827936 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

316237576 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

317507112 472

317507584 590907392 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

908414976 68358144 5 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: AF 1023 254 63 - 1023 254 63 [ 409640 - 315827936] HFS+

3: AB 1023 254 63 - 1023 254 63 [ 316237576 - 1269536] Darwin Boot

4: 07 1023 254 63 - 1023 254 63 [ 317507584 - 590907392] HPFS/QNX/AUX

diskutil list

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *500.1 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh HD 161.7 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data HD2 302.5 GB disk0s4

5: Microsoft Basic Data BOOTCAMP 35.0 GB disk0s5

MacBook Pro (13-inch Mid 2012), OS X Yosemite (10.10.5), null

Posted on Feb 3, 2016 8:55 AM

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Question marked as Best reply

Posted on Feb 3, 2016 11:09 AM

The resizing/re-partitioning of this configuration is not supported by Apple - Boot Camp: Resize the Windows partition . The easier method is to use an external disk.


It may be possible to re-build your Hybrid MBR. Can you use Bootcamp disappears after creating third partition as a reference and use the steps to check and create the MBR, if the Bootcamp partition still has the NTFS header.

8 replies
Question marked as Best reply

Feb 3, 2016 11:09 AM in response to Shubh961

The resizing/re-partitioning of this configuration is not supported by Apple - Boot Camp: Resize the Windows partition . The easier method is to use an external disk.


It may be possible to re-build your Hybrid MBR. Can you use Bootcamp disappears after creating third partition as a reference and use the steps to check and create the MBR, if the Bootcamp partition still has the NTFS header.

Feb 3, 2016 8:56 PM in response to Loner T

Alright I learnt that I can't just reinstall windows again with Bootcamp Assistant.

I checked the reference link that you shared, but our cases are different, in the link that user wants to extend Windows Partition whereas I want to set up a shared partition. I still don't have any data in Windows and the third partition that I created so I can remove them for now. But later on I still want a third partition for shared drive. Is it possible?

Bootcamp partition not working after resizing HD

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