Repairing Boot Camp after creating new partition

Hi

My Macbook pro is running 10.12.6 and am using windows 8.1pro 64bit.

I tried to resize my partition, but after i did partition in my mac the windows bootcamp says "No bootable device please insert disk" like that. I can see the bootacamp in my mac but couldn't able to start my windows. I saw the thread for this problem, but i couldn't find the problem.

please help me with this.

Already initiated a new thread with some details:-

Please let me know if you need any specific info on the below new thread .

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

Hey I have a question about the terminal commands! I started a new discussion at: Trying to repair Windows Partition.... The command window prompts from the other discussion did not work

Thanks in advance!

You need to disable SIP as shown. It is also in Re: Repairing Boot Camp after creating new partition a couple of posts above yours.

You have either El Capitan or Sierra. You will need to temporarily 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. Once SIP is disabled, re-run your steps and test. If it works correctly, please re-enable SIP using csrutil enable.

Hi, I have tried the same way but it didn't worked for me in the last 2 steps(Check the last 4 lines):

Can you help in providing some workaround for this.

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

These MBR fixes are valid for a specific type of a problem and are not universal steps to fix all Windows issues on a Mac. Please start a new discussion and post relevant outputs for further diagnosis.

Hi Loner T, I have the same problem and I have gone through your solution but when I type 'write' and press return key, terminal tells me that "fdisk: /dev/disk0: Operation not permitted"

What can I do about this? Can you please lead me?

Hi there, what's up? I hope all is well. Godman Yeshua Jesus Christ is Awesome!!! God totally healed my brain, so I'm having a grand time playing around with my computer. However, when I tried to increase the windows bootcamp partition, the windows 7 bootcamp disappeared from the boot list on startup while holding 'alt/option' during boot up.

Just surfed here from a google search about bootcamp windows 7 disappearing, randomly not showing up on the boot list boot up on startup. Upon coding the provided information by LonerT and MacTavish_10 in terminal on OS Sierra 10.12.5 (16F73), the hiding bootcamp partition on boot up is still not on the list and attempting to startup bootcamp using Startup Disk showed errors. I'm sure their steps may have worked well on other versions of Sierra, but I had to take an alternative route to achieve successful results. I hope you are able to solve your issue as well.

1) Mount the Original Windows 7 Install Disk

2) Open up Startup Disk

3) Select the Original Windows 7 Install Disk

4) Select "Repair" to repair the Windows Installation

5) Restart and hold alt/option then your Windows 7 Bootcamp partition will be selectable on the bootlist.

Someone on here came up with the solution to use the Original Windows 7 Install Disk, which is a brilliant idea. I'm just trying to clarify the process so you are able to boot up with your resources intact.

Peace and God Bless,

Mark Angelo

You will need to temporarily disable SIP by booting into Local Recovery (using Command+R - not Internet Recovery) and clicking 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.

After following your instructions when I enter 'w' and click return then enter 'p'

I get the message

Device could not be accessed exclusively.

A reboot will be needed for changes to take effect. OK? [n]

I have reboot my MacBook like 10x but still get this error. Please tell me what else I can do

I have created a new question please check for it and see if you have solutions for me.

Q:After Creating a new Partition on my MacBook Pro (13-inch, Mid 2012) I can no longer find my window 7 partition on my disk setup

You have either El Capitan or Sierra. You will need to temporarily 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. Once SIP is disabled, re-run your steps and test. If it works correctly, please re-enable SIP using csrutil enable.

Mister Loner please help me with my similar situation.

Windows is not showing at startup.

Please check the attached picture of your instructions that I followed.

SIERRA 10.12.3 Macbook Air, 11 inch mid 2011.

Followed all steps successfully.

Now the Windows partition is shown but instead of starting black screen shows blinking underscore.

What can I do next?

startup repair says failed.

Reset says drive where windows is installed is locked.

Disk Utility says Bootable:NO

Can we make it bootable? May be it will work.