Repairing bootcamp after creating partition in Macbook Pro 13" Mid-2012

Question

Level 1

8 points

Repairing bootcamp after creating partition in Macbook Pro 13" Mid-2012

Hi All,

I have made a mistake like few other users and created a FAT-partition to resize my bootcamp partition space.

After this I am not able to boot into Windows (Bootcamp) anymore. I can see it when choosing the default start up system in OS X but I can not choosing it after restart with ALT-key pressed.

I've read some threads about the exact same problem, but as every user was ask to post a new problem,

I'm doing so now and hoping that there will be someone who will help me out in this situation.

I've even tried executing few procedures mentioned in the old threads but it didn't worked well in last few steps.

My system:

MacBook Pro 13" mid 2012

OS X Sierra 10.12.3

(Windows 10 on Bootcamp)

Below I attach the output of various commands mentioned in other threads:

diskutil list

MaddyApples-MacBook-Pro:~ MaddyApple$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *500.1 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh HD 349.2 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data BOOTCAMP 150.0 GB disk0s4

/dev/disk1 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: FDisk_partition_scheme *1.0 TB disk1

1: Windows_NTFS Seagate Backup Plus ... 1.0 TB disk1s1

diskutil cs list

MaddyApples-MacBook-Pro:~ MaddyApple$ diskutil cs list

No CoreStorage logical volume groups found

MaddyApples-MacBook-Pro:~ MaddyApple$

sudo gpt -vv -r show /dev/disk0

MaddyApples-MacBook-Pro:~ MaddyApple$ sudo gpt -vv -r show /dev/disk0

Password:

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

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

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

gpt show: /dev/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 682125496 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

682535136 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

683804672 292968448 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

976773120 15

976773135 32 Sec GPT table

976773167 1 Sec GPT header

MaddyApples-MacBook-Pro:~ MaddyApple$

sudo fdisk /dev/disk0

MaddyApples-MacBook-Pro:~ MaddyApple$ 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 - 682125496] HFS+

3: AB 1023 254 63 - 1023 254 63 [ 682535136 - 1269536] Darwin Boot

4: 0C 1023 254 63 - 1023 254 63 [ 683804672 - 292968448] Win95 FAT32L

MaddyApples-MacBook-Pro:~ MaddyApple$

I really want to fix this ASAP, Please help me, thank you very much in advance.

MacBook Pro, iOS 10.2.1

Posted on Jan 30, 2017 7:29 AM

Reply

Answer 1

Best reply

Loner T

Level 9

59,471 points

Jan 30, 2017 8:34 PM in response to piyush2129

1. Shutdown your Mac.

2. Power it backup and hold Command+R, before the Apple logo shows. If you see a spinning globe, you have additional issues.

3. If you do not see a spinning globe, you are in Local Recovery. Click on Utilities -> Terminal in the Menu bar, and type each line beginning with csrutil and press enter/return.

4. After all three commands complete successfully, click on the Apple icon, select Quit, and choose the OS X startup disk for normal boot.

5. Type csrutil status in normal Terminal window to verify that the previous set of commands was done correctly. Now continue with the fdisk steps.

Reply

Answer 2

Loner T

Level 9

59,471 points

Jan 30, 2017 11:31 AM in response to piyush2129

piyush2129 wrote:

fdisk:*1> write

fdisk: /dev/disk0: Operation not permitted

You need to disable SIP. Please use the steps in Re: bootcamp fails to start after upgrade to macOS Sierra . Do not use Mini Partition Tool. It does not work correctly on a Mac.

Apple tools do not support resizing Windows partition. You either need to remove/re-install Windows or use third-party cloning software. There are other tools (GParted and Startup Repair), or Windows backup/restore which may also work.

Reply

Answer 3

piyush2129 Author

Level 1

8 points

Jan 30, 2017 7:47 AM in response to piyush2129

Adding few more details as recommended from the last thread:-

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

MaddyApples-MacBook-Pro:~ MaddyApple$ sudo dd if=/dev/rdisk0s4 count=1 2>/dev/null | hexdump -C

Password:

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 08 c2 28 |........?......(|

00000020 00 00 00 00 80 00 80 00 ff 3f 68 11 00 00 00 00 |.........?h.....|

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 07 4d 5f b2 7d 5f b2 2a |.........M_.}_.*|

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 52 11 16 68 09 00 66 53 66 53 66 |h...hR..h..fSfSf|

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

00000110 0a 13 b9 f6 0c fc f3 aa e9 fe 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 a1 f6 01 e8 09 00 |...u...fa.......|

00000170 a1 fa 01 e8 03 00 f4 eb fd 8b f0 ac 3c 00 74 09 |............<.t.|

00000180 b4 0e bb 07 00 cd 10 eb f2 c3 0d 0a 41 20 64 69 |............A di|

00000190 73 6b 20 72 65 61 64 20 65 72 72 6f 72 20 6f 63 |sk read error oc|

000001a0 63 75 72 72 65 64 00 0d 0a 42 4f 4f 54 4d 47 52 |curred...BOOTMGR|

000001b0 20 69 73 20 63 6f 6d 70 72 65 73 73 65 64 00 0d | is compressed..|

000001c0 0a 50 72 65 73 73 20 43 74 72 6c 2b 41 6c 74 2b |.Press Ctrl+Alt+|

000001d0 44 65 6c 20 74 6f 20 72 65 73 74 61 72 74 0d 0a |Del to restart..|

000001e0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|

000001f0 00 00 00 00 00 00 8a 01 a7 01 bf 01 00 00 55 aa |..............U.|

00000200

Reply

Answer 4

piyush2129 Author

Level 1

8 points

Jan 30, 2017 8:15 AM in response to Loner T

What tool did you use? What was done to the FAT partition? Did you try some other 'Google' links to try and fix before posting here? Did you use a link from the Nerdr website?

I have used Disk utility to create another free partition, which I was supposed to include in my bootcamp partition via Mini Tool partition wizard. But just after creating the new partition, when I restarted my MacBook it didn't recognise any bootcamp partition from where it can boot the Windows, but its actually there when I looked under the Mac OS.

I have simply tried the below steps:-

sudo fdisk -e /dev/disk0

p

setpid 4

07

flag 4

p

write

y

Results from the above steps are as follows:-

Last login: Mon Jan 30 17:48:12 on ttys000

MaddyApples-MacBook-Pro:~ MaddyApple$ 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 682125496 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

682535136 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

683804672 292968448 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

976773120 15

976773135 32 Sec GPT table

976773167 1 Sec GPT header

MaddyApples-MacBook-Pro:~ MaddyApple$ 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 - 682125496] HFS+

3: AB 1023 254 63 - 1023 254 63 [ 682535136 - 1269536] Darwin Boot

4: 0C 1023 254 63 - 1023 254 63 [ 683804672 - 292968448] Win95 FAT32L

MaddyApples-MacBook-Pro:~ MaddyApple$ sudo fdisk -e /dev/disk0

Password:

fdisk: could not open MBR file /usr/standalone/i386/boot0: No such file or directory

Enter 'help' for information

fdisk: 1> p

Disk: /dev/disk0 geometry: 60801/255/63 [976773168 sectors]

Offset: 0 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 - 682125496] HFS+

3: AB 1023 254 63 - 1023 254 63 [ 682535136 - 1269536] Darwin Boot

4: 0C 1023 254 63 - 1023 254 63 [ 683804672 - 292968448] Win95 FAT32L

fdisk: 1> setpid 4

Starting Ending

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

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

4: 0C 1023 254 63 - 1023 254 63 [ 683804672 - 292968448] Win95 FAT32L

Partition id ('0' to disable) [0 - FF]: [C] (? for help) 07

fdisk:*1> flag 4

Partition 4 marked active.

fdisk:*1> p

Disk: /dev/disk0 geometry: 60801/255/63 [976773168 sectors]

Offset: 0 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 - 682125496] HFS+

3: AB 1023 254 63 - 1023 254 63 [ 682535136 - 1269536] Darwin Boot

*4: 07 1023 254 63 - 1023 254 63 [ 683804672 - 292968448] HPFS/QNX/AUX

fdisk:*1> write

fdisk: /dev/disk0: Operation not permitted

MaddyApples-MacBook-Pro:~ MaddyApple$ y

-bash: y: command not found

In the last two steps it wasn't able to perform the operation as expected.

Reply

Answer 5

piyush2129 Author

Level 1

8 points

Jan 30, 2017 8:17 AM in response to piyush2129

Just adding one more point here, when I wasn't able to boot the windows after creating the partition then I deleted that new partition and merged it with Mac OS partition back. And then I have performed all the above mentioned steps in my last reply.

Reply

Answer 6

piyush2129 Author

Level 1

8 points

Jan 30, 2017 5:49 PM in response to Loner T

You have mentioned the below recovery details:-

I have the Sierra OS, but not sure how to perform this step:

You will need to disable SIP by booting into Local Recovery (using Command+R - not Internet Recovery) and click on Utilities -> Terminal and type

You have either El Capitan or Sierra. You will need to disable SIP by booting into Local Recovery (using Command+R - not Internet Recovery) and click on Utilities -> Terminal and type

csrutil status

csrutil disable

csrutil status

Boot normally and check the output of csrutil status which should now be disabled.

Run the following commands (ignore the i386 MBR error but not any others) and test.

sudo fdisk -e /dev/disk0

p

setpid 4

07

flag 4

p

w

y

Reboot and Test.

Reply

Answer 7

Loner T

Level 9

59,471 points

Jan 30, 2017 8:05 AM in response to piyush2129

What tool did you use? What was done to the FAT partition? Did you try some other 'Google' links to try and fix before posting here? Did you use a link from the Nerdr website?

Reply