bootcamp partition not showing up in El Capitan

Thanks Loner T. I was able to fix my bootcamp partition with your inputs on this thread.

Awesome work

Please back up OSX and Windows and create a Windows System Restore point.

Will do. Thanks again

Hi Loner T

I tried what you suggested, but was met with an error 😟

In step 12 of the first section "Rebuild GPT4 using start/end offsets", I received the following error message:

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

Please help!

Thanks so much in advance 🙂

Apologies, so I did this issue sorted and retried. Everything was successful, but nothing has changed. I still can't see Bootcamp...

Can you post a new discussion and include the output of the following OS X Terminal commands to avoid confusion with OP?

diskutil list

diskutil cs list

sudo gpt -vv -r show /dev/disk0

sudo fdisk /dev/disk0

The "sudo" commands will prompt for your password, and it will not be echoed back. You may also see a warning about improper use of "sudo" and potential data loss due to "abuse" of the command.

Sure. Have placed a new post 🙂

My issue is that i don't see a 4th partition..

Heres my thread for this: Invisible BootCamp Partition I can't access nor delete!

I got an used Macbook Pro 15", late 2011. It has the disc drive replaced with an additional hard disk.

I decided to install Windows 7 on the additional disk, which has two partitions: one for mac and the other for windows.

I used the virtual box method to install windows on the macbook, the installation went fine, until the reboot to the real hardware. The windows partition shows up in the mac os settings where I can choose it to boot from it, but when I reboot I end up with a black screen with a cursor...

the method I used:

http://apple.stackexchange.com/questions/179486/boot-camp-install-of-windows-7-i ssue-no-bootable-devices?rq=1

If I boot the mac holding the alt key it only shows the OS X drive... But I can see the windows partition on the desktop and browse the windows files...

The original drive (disk0) has one partition and contains OS X, disk1 is the additional drive with two partitions: one for mac files and one for windows.

sudo fdisk /dev/disk1

Password:

Disk: /dev/disk1 geometry: 91201/255/63 [1465149168 sectors]

Signature: 0xAA55

Starting Ending

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

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

1: EE 0 0 2 - 1023 254 63 [ 1 - 1273743359] <Unknown ID>

*2: 07 1023 254 63 - 1023 254 63 [1273743360 - 191404032] HPFS/QNX/AUX

3: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

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

sudo gpt -vv -r show /dev/disk1

gpt show: /dev/disk1: mediasize=750156374016; sectorsize=512; blocks=1465149168

gpt show: /dev/disk1: Suspicious MBR at sector 0

gpt show: /dev/disk1: Pri GPT at sector 1

gpt show: /dev/disk1: Sec GPT at sector 1465149167

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 1273071088 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

1273480728 262632

1273743360 191404032 3 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

1465147392 1743

1465149135 32 Sec GPT table

1465149167 1 Sec GPT header

sudo gdisk /dev/disk1

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/disk1: 1465149168 sectors, 698.6 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): 2079FB32-0170-42A8-89A2-044405B6C35A

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 1465149134

Partitions will be aligned on 8-sector boundaries

Total free space is 264381 sectors (129.1 MiB)

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

1 40 409639 200.0 MiB EF00 EFI System Partition

2 409640 1273480727 607.0 GiB AF00 MacExtra

3 1273743360 1465147391 91.3 GiB 0700 BOOTCAMP

Please start a new discussion in Boot Camp . Typically, Windows is installed on the Main drive bay disk. What is the year/model of your Mac?

Thanks for your answer, it's a MacBook Pro (15-inch, Late 2011) , model name MacBookPro8,2

Hi LonerT,

I'm having the same problem I try to execute but not sure with values should in the Start / End Offset.

Could I bother you with some help please?

Thanks!

The start/end/size is unique for each disk and installation. Can you start a new discussion and post the output of Testdisk screen?