gpt error after partition change - extra ghost partition in table, can't find Bootcamp in finder, but can log into both OSX and Win10

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Brian F Wong Author

Level 1

44 points

gpt error after partition change - extra ghost partition in table, can't find Bootcamp in finder, but can log into both OSX and Win10

Yesterday I took about 25gb from the OSX partition and moved it to the Windows partition.

I can log into both OSX and Bootcamp, but I can no longer see Bootcamp in finder.

Output of some key commands:

sudo gpt -vv -r show /dev/disk0

sudo gpt -vv -r show /dev/disk0

gpt show: /dev/disk0: mediasize=500277790720; sectorsize=512; blocks=977105060

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

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

gpt show: error: bogus map

gpt show: unable to open device '/dev/disk0': Undefined error: 0

sudo gdisk /dev/disk0

sudo gdisk /dev/disk0

Password:

GPT fdisk (gdisk) version 1.0.1

Warning: Devices opened with shared lock will not have their

partition table automatically reloaded!

Partition table scan:

MBR: hybrid

BSD: not present

APM: not present

GPT: present

Found valid GPT with hybrid MBR; using GPT.

Command (? for help): p

Disk /dev/disk0: 977105060 sectors, 465.9 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): E6C76A39-7886-4C35-B924-3AFB92CF9BED

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 977105026

Partitions will be aligned on 8-sector boundaries

Total free space is 262281 sectors (128.1 MiB)

Number Start (sector) End (sector) Size Code Name

1 40 409639 200.0 MiB EF00 EFI System Partition

2 409640 586347135 279.4 GiB AF00 Customer

3 586347136 587616671 619.9 MiB AB00 Recovery HD

4 587616672 635047935 22.6 GiB AF00 Untitled

5 635310080 977104895 163.0 GiB 0700 BOOTCAMP

Bootcamp is actually both 4 and 5 here, as far as windows is concerned.

sudo fdisk /dev/disk0

sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 60821/255/63 [977105060 sectors]

Signature: 0xAA55

Starting Ending

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

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

1: EE 0 0 2 - 1023 254 63 [ 1 - 586347135] <Unknown ID>

2: AB 1023 254 63 - 1023 254 63 [ 586347136 - 1269536] Darwin Boot

*3: 07 1023 254 63 - 1023 254 63 [ 587618304 - 389486592] HPFS/QNX/AUX

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

I've gone into the recovery disk and done csrutil disable:

csrutil status

System Integrity Protection status: disabled.

My system:

MacBook Pro (Retina, 15-inch, Late 2013)

OSX 10.11.5 (15F34)

ModelName: MacBookPro

ModelIdentifier: MacBookPro11,3

ProcessorName: IntelCorei7

ProcessorSpeed: 2.3GHz

NumberofProcessors: 1

TotalNumberofCores: 4

L2Cache(perCore): 256KB

L3Cache: 6MB

Memory: 16GB

BootROMVersion: MBP112.0138.B17

SMCVersion(system): 2.19f12

NVIDIA GeForce GT 750M

MacBook Pro with Retina display, OS X El Capitan (10.11.5), 15", Late 2013, 16GB 750M-Nvidia

Posted on May 19, 2016 10:33 PM

Reply

Answer 1

brenden dv

Community Specialist

May 21, 2016 8:53 AM in response to Brian F Wong

Hi Brian F Wong,

Thanks for using the Apple Support Communities. I'm sorry to hear you are having these issues with Boot Camp on your Windows machine. Generally, resizing of Boot Camp partitions isn't directly supported (outside of deleting and recreating them), as noted in the following article:

Modify the Windows partition

Remove the partition, change its size, or change its name.

Remove the partition

Use Boot Camp Assistant to safely remove Windows and the Windows partition from your Mac, restoring your startup drive to a single Mac partition. You may want to back up your information first, because removing the partition erases all of the data it contains.

Open Boot Camp Assistant.

Select “Remove Windows 7 or later version," then click Continue.

Do one of the following:

If your Mac has a single internal disk, click Restore.

If your Mac has multiple internal disks, select the Windows disk, select “Restore disk to a single OS X partition,” then click Continue.

Change the size of the partition

It's not possible to change the size of the partition after installing Windows, but you can remove the partition and create a new partition of the correct size. Don't try to resize your partition with Windows or a third-party app.

Set up a Windows partition on your Mac - Apple Support

Regards

Reply

Answer 2

Loner T

Level 9

59,536 points

May 21, 2016 5:31 PM in response to Brian F Wong

Brian F Wong wrote:

Yesterday I took about 25gb from the OSX partition and moved it to the Windows partition.

How?

sudo gpt -vv -r show /dev/disk0

sudo gpt -vv -r show /dev/disk0

gpt show: /dev/disk0: mediasize=500277790720; sectorsize=512; blocks=977105060

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

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

gpt show: error: bogus map

gpt show: unable to open device '/dev/disk0': Undefined error: 0

You have a corrupted GPT. This is why you cannot see it in OS X. Did you use the MiniTool Partition wizard? It is a dangerous tool and should never be used.

Reply

ModelName:	MacBookPro
ModelIdentifier:	MacBookPro11,3
ProcessorName:	IntelCorei7
ProcessorSpeed:	2.3GHz
NumberofProcessors:	1
TotalNumberofCores:	4
L2Cache(perCore):	256KB
L3Cache:	6MB
Memory:	16GB
BootROMVersion:	MBP112.0138.B17
SMCVersion(system):	2.19f12