[Help] Can't boot to windows (8.1) after resizing partition

These steps will make Windows bootable. It will not merge the 79GB into the 50GB Windows that you currently have.

Gdisk uses one character commands, and the text in parentheses is explanation is not to be type in utility. Step 6 has numbers separated by a single space.

Look at the sample Q&A in my post.

This looks good. Please reboot and test OS X and Windows.

If you merge the 79GB using Gparted into the Windows partiton, you will need to recreate the MBR. Use 2 3 4 instead of 3 4 5 after you merge the two partitions.

Thanks for this posting!

My situation wasI resized my mac partition to make a shared partition for xfering files MAC<-> WIN.

I couldn't find my bootcamp upon startup but following same steps as this post fixed my issue.

Here are the characteristics of my drive if anyone else has the same situation.

iMac:~ brian$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *2.0 TB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_HFS iMAC 1.4 TB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
4: Microsoft Basic Data SHARED 250.5 GB disk0s4
5: Microsoft Basic Data 398.5 GB disk0s5
iMac:~ brian$
iMac:~ brian$
iMac:~ brian$
iMac:~ brian$
iMac:~ brian$
iMac:~ brian$ discutil cs list
-bash: discutil: command not found
iMac:~ brian$ diskutil cs list
No CoreStorage logical volume groups found
iMac:~ brian$ diskutil cs list
No CoreStorage logical volume groups found
iMac:~ brian$ sudo fdisk /dev/disk0
Password:
Disk: /dev/disk0 geometry: 243201/255/63 [3907029168 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 - 2637526224] HFS+
3: AB 1023 254 63 - 1023 254 63 [2637935864 - 1269544] Darwin Boot
4: 0B 1023 254 63 - 1023 254 63 [2639205408 - 489165792] Win95 FAT-32
iMac:~ brian$
iMac:~ brian$
iMac:~ brian$
iMac:~ brian$
iMac:~ brian$
iMac:~ brian$
iMac:~ brian$ sudo gpt -v -r show /dev/disk0
gpt show: /dev/disk0: mediasize=2000398934016; sectorsize=512; blocks=3907029168
gpt show: /dev/disk0: Suspicious MBR at sector 0
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 2637526224 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC
2637935864 1269544 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
2639205408 489165792 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
3128371200 262144
3128633344 778395648 5 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
3907028992 143
3907029135 32 Sec GPT table
3907029167 1 Sec GPT header
iMac:~ brian$
iMac:~ brian$
iMac:~ brian$
iMac:~ brian$
iMac:~ brian$ sudo fdisk /dev/disk0
Disk: /dev/disk0 geometry: 243201/255/63 [3907029168 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 - 2637526224] HFS+
3: AB 1023 254 63 - 1023 254 63 [2637935864 - 1269544] Darwin Boot
4: 0B 1023 254 63 - 1023 254 63 [2639205408 - 489165792] Win95 FAT-32
iMac:~ brian$
iMac:~ brian$
iMac:~ brian$
iMac:~ brian$
iMac:~ brian$
iMac:~ brian$
iMac:~ brian$
iMac:~ brian$
iMac:~ brian$ sudo dd if=/dev/rdisk0s5 count=1 2>/dev/null | hexdump -C
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 28 7b ba |........?....({.|
00000020 00 00 00 00 80 00 80 00 ff 4f 57 2e 00 00 00 00 |.........OW.....|
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 50 d5 c7 d6 14 c8 d6 f4 |........P.......|
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$....r..|
000000f0 68 07 bb 16 68 52 11 16 68 09 00 66 53 66 53 66 |h...hR..h..fSfSf|
00000100 55 16 16 16 68 b8 01 66 61 0e 07 cd 1a 33 c0 bf |U...h..fa....3..|
00000110 0a 13 b9 f6 0c fc f3 aa e9 fe 01 90 90 66 60 1e |.............f`.|
00000120 06 66 a1 11 00 66 03 06 1c 00 1e 66 68 00 00 00 |.f...f.....fh...|
00000130 00 66 50 06 53 68 01 00 68 10 00 b4 42 8a 16 0e |.fP.Sh..h...B...|
00000140 00 16 1f 8b f4 cd 13 66 59 5b 5a 66 59 66 59 1f |.......fY[ZfYfY.|
00000150 0f 82 16 00 66 ff 06 11 00 03 16 0f 00 8e c2 ff |....f...........|
00000160 0e 16 00 75 bc 07 1f 66 61 c3 a1 f6 01 e8 09 00 |...u...fa.......|
00000170 a1 fa 01 e8 03 00 f4 eb fd 8b f0 ac 3c 00 74 09 |............<.t.|
00000180 b4 0e bb 07 00 cd 10 eb f2 c3 0d 0a 41 20 64 69 |............A di|
00000190 73 6b 20 72 65 61 64 20 65 72 72 6f 72 20 6f 63 |sk read error oc|
000001a0 63 75 72 72 65 64 00 0d 0a 42 4f 4f 54 4d 47 52 |curred...BOOTMGR|
000001b0 20 69 73 20 63 6f 6d 70 72 65 73 73 65 64 00 0d | is compressed..|
000001c0 0a 50 72 65 73 73 20 43 74 72 6c 2b 41 6c 74 2b |.Press Ctrl+Alt+|
000001d0 44 65 6c 20 74 6f 20 72 65 73 74 61 72 74 0d 0a |Del to restart..|
000001e0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
000001f0 00 00 00 00 00 00 8a 01 a7 01 bf 01 00 00 55 aa |..............U.|
00000200
iMac:~ brian$

Please back up OS X, Windows and create a Windows System restore point.

I got the same problem. I tried your step by step and got an error at the end.

MacBook-Pro-de-Antoine:~ antoinerivard$ csrutil status

System Integrity Protection status: enabled.

MacBook-Pro-de-Antoine:~ antoinerivard$ sudo gdisk / dev/rdisk0

Password:

GPT fdisk (gdisk) version 1.0.1

Usage: gdisk [-l] device_file

MacBook-Pro-de-Antoine:~ antoinerivard$ p

-bash: p: command not found

MacBook-Pro-de-Antoine:~ antoinerivard$ Sudo gdisk /dev/rdisk0

GPT fdisk (gdisk) version 1.0.1

Warning: Devices opened with shared lock will not have their

partition table automatically reloaded!

NOTE: Write test failed with error number 1. It will be impossible to save

changes to this disk's partition table!

You may need to deactivate System Integrity Protection to use this program. See

https://www.quora.com/How-do-I-turn-off-the-rootless-in-OS-X-El-Capitan-10-11

for more information.

Partition table scan:

MBR: protective

BSD: not present

APM: not present

GPT: present

Found valid GPT with protective MBR; using GPT.

Command (? for help): p

Disk /dev/rdisk0: 977105060 sectors, 465.9 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): 0BD1259A-903C-4656-966F-B0C23658D73F

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 762128383 363.2 GiB AF00 Mac Antoine

3 762128384 763397927 619.9 MiB AB00 Recovery HD

4 763397928 781531135 8.6 GiB AF00 Sans titre

5 781793280 977104895 93.1 GiB 0700 BOOTCAMP

Command (? for help): r

Recovery/transformation command (? for help): o

Disk size is 977105060 sectors (465.9 GiB)

MBR disk identifier: 0xC27FC94D

MBR partitions:

Number Boot Start Sector End Sector Status Code

1 1 977105059 primary 0xEE

Recovery/transformation command (? for help): h

WARNING! Hybrid MBRs are flaky and dangerous! If you decide not to use one,

just hit the Enter key at the below prompt and your MBR partition table will

be untouched.

Type from one to three GPT partition numbers, separated by spaces, to be

added to the hybrid MBR, in sequence: 3 4 5

Place EFI GPT (0xEE) partition first in MBR (good for GRUB)? (Y/N): y

Creating entry for GPT partition #3 (MBR partition #2)

Enter an MBR hex code (default AB):

Set the bootable flag? (Y/N): n

Creating entry for GPT partition #4 (MBR partition #3)

Enter an MBR hex code (default AF):

Set the bootable flag? (Y/N): n

Creating entry for GPT partition #5 (MBR partition #4)

Enter an MBR hex code (default 07):

Set the bootable flag? (Y/N): y

Recovery/transformation command (? for help): o

Disk size is 977105060 sectors (465.9 GiB)

MBR disk identifier: 0xC27FC94D

MBR partitions:

Number Boot Start Sector End Sector Status Code

1 1 762128383 primary 0xEE

2 762128384 763397927 primary 0xAB

3 763397928 781531135 primary 0xAF

4 * 781793280 977104895 primary 0x07

Recovery/transformation command (? for help): w

Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING

PARTITIONS!!

Do you want to proceed? (Y/N): y

OK; writing new GUID partition table (GPT) to /dev/rdisk0.

Warning: Devices opened with shared lock will not have their

partition table automatically reloaded!

Unable to open device '/dev/rdisk0' for writing! Errno is 1! Aborting write!

When I went in Terminal in recovery mode, I type csrutil disable, but wasn't working.

Can you help me?

Thx

Tonyrivard18 wrote:

NOTE: Write test failed with error number 1. It will be impossible to save

changes to this disk's partition table!

You may need to deactivate System Integrity Protection to use this program. See

You need to boot into Local Recovery (Command+R) and run csrutil status and and then csrutil disable. Internet Recovery will not work.

I boot with cmb+R and i went in terminal :

-bash-3,2# csrutil status

-bash: csrutil: command not found

I am not sure if when I boot with cmd+R if i'm really in Local Recovery or in Internet Recovery. It ask me to connect on my wifi.