Yosemite Upgrade Broke Bootcamp

I cannot see the image, due to issues with the forum. Can you start a new thread and post the image using an image sharing service?

Hi, why does your step 5 performed in testdisk? not disk?

rubby0913 wrote:

Hi, why does your step 5 performed in testdisk? not disk?

5. Once you a working GPT#4, a new hybrid MBR needs to be created which will overwrite what you see in your Fdisk output. This is also done using GPT Fdisk (Gdisk).

It is using Gdisk.

@lonerT broken partition

this is a whole lot of nonsense work that shouldn't be required by the end user. do any of you know if its possible to roll back before yosemite upgrade?

Sixpack Jack wrote:

do any of you know if its possible to roll back before yosemite upgrade?

I am not sure what you are asking to be rolled back. 😕

Sorry just frustrated what I meant to say was, here is my situation

I use bootcamp to boot windows 8 for my networking school work. but i upgraded to yosemite this week and now i can't boot into my windows 8 any more i see the disk, when i hold down the option button and when i select it it appears to attempt to boot, but then goes to a black screen and stays there, its crucial for me to get into that because all of my school work for cisco classes is on that due to needing packet tracer. I don't know what to do, so when i posed the question can i roll back yosemite, what i meant was can i downgrade from yosemite back to maverick and get my access back to my bootcamp OS. earlier i just dropped a quick comment obviously the wrong thing to do was just frustrated I hope this is more descriptive and someone can help me.

Thanks

Brian

Please start a new thread. In this article, there are four commands executed from OS X Terminal which would be very helpful in the new thread. The damage has already been done by the Yosemite upgrade. Please post text output of the commands after removing any personal information as you see fit.

Let me know if you need the commands.

If you don't mind , can you give me those commands. I will respond asap.

diskutil list

diskutil cs list

sudo gpt -vv -r show /dev/disk0

sudo fdisk /dev/disk0

i just open terminal and use these in terminal

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *251.0 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh HD 171.6 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data 78.5 GB disk0s4

No CoreStorage logical volume groups found

gpt show: /dev/disk0: mediasize=251000193024; sectorsize=512; blocks=490234752

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 490234751

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 335216608 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

335626248 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

336895784 216

336896000 153337856 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

490233856 863

490234719 32 Sec GPT table

490234751 1 Sec GPT header

Disk: /dev/disk0 geometry: 30515/255/63 [490234752 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 - 335216608] HFS+

3: AB 1023 254 63 - 1023 254 63 [ 335626248 - 1269536] Darwin Boot

*4: 07 1023 254 63 - 1023 254 63 [ 336896000 - 153337856] HPFS/QNX/AUX