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Another Windows- bootcamp won't start after installing OSX Yosemite

Anyone that can help, special attention T Loner:


Additionally my mac was configured with a MAC Partition, a Media Partition (I used this to share my iTunes media between both OS), and finally my bootcamp partition.


When I upgraded to Yosemite I completely lost access to my bootcamp, and an message appeared "No bootable drive". I searched thru a lot of your forms to try and attempt to find a solution and at one point I found this threadRepairing Boot Camp after creating new partition and I followed these steps:

Enter '7'

Press Return Key

Enter 'flag 4'

Press Return Key

Enter 'p'

Press Return Key

Enter 'w'

Press Return Key

Enter 'y'

Press Return Key

Now I am still unable to load bootcamp and I have a different black screen "non-system disk press any key to reboot"

I think I maybe may have set myself back more by following the above directions.

Here's the terminal:

Last login: Fri Dec 11 20:34:33 on console

Chriss-iMac:~ chriswilloughby$ diskutil list

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.0 TB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh HD 200.1 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data MEDIA 494.3 GB disk0s4

5: Microsoft Basic Data BOOTCAMP 305.0 GB disk0s5

Chriss-iMac:~ chriswilloughby$ diskutil cs list

No CoreStorage logical volume groups found

Chriss-iMac:~ chriswilloughby$ sudo gpt -vv -r show /dev/disk0

Password:

gpt show: /dev/disk0: mediasize=1000204886016; sectorsize=512; blocks=1953525168

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 1953525167

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 390759112 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

391168752 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

392438288 1520

392439808 965394432 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

1357834240 595689472 5 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

1953523712 1423

1953525135 32 Sec GPT table

1953525167 1 Sec GPT header

Chriss-iMac:~ chriswilloughby$ sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 121601/255/63 [1953525168 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 - 390759112] HFS+

3: AB 1023 254 63 - 1023 254 63 [ 391168752 - 1269536] Darwin Boot

*4: 07 1023 254 63 - 1023 254 63 [ 392439808 - 965394432] HPFS/QNX/AUX

Chriss-iMac:~ chriswilloughby$

iMac, OS X Yosemite (10.10.4)

Posted on Dec 11, 2015 5:40 PM

Reply
6 replies

Dec 11, 2015 5:59 PM in response to Chrisw0889

You have 5 partitions. The set of steps you have executed assumes that your GPT 4 entry is the Windows entry. In your case, it is GPT5. You will have to build a new hybrid MBR, but you will lose visibility to the OS X partition. You will have to use your shared partition "Media" to move files between OS X and Windows.


See the solution steps in My Windows partition is not bootable after create a new partition to create a new hybrid MBR with GPT 3 4 5 . You will need to download GPT Fdisk.

Dec 11, 2015 7:30 PM in response to Chrisw0889

Chrisw0889 wrote:


Lets say I didn't care about the Media and Bootcamp drive, what would I do to delete those two partitions and make one big partition again? Maybe Ill just bring my computer back to a normal state with just OS X. Down the road I would like the ability to re-install bootcamp.


I suggest you backup Media, files that you need from Bootcamp. Backup OS X using Time Machine. Boot into Internet Recovery, erase your internal disk and restore from the OS X backup on TM.

Another Windows- bootcamp won't start after installing OSX Yosemite

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