Windows 10 Bootcamp dual boot problem after El Capitan upgrade

Question

Level 1

0 points

Windows 10 Bootcamp dual boot problem after El Capitan upgrade

Hi guys,

I have an Early 2013 Retina Macbook Pro (2,6 GHz Interl Core i5, (GB DDR3 RAM, 256 GB SSD) computer.

I used OS X Mavericks with Windows 10 Bootcamp and it worked perfectly until I upgraded to OS X El Capitan (I skipped Yosemite).

Now in the boot menu I can see the Windows partition but if I start that I see "Missing operation system" message.

I tried some of the previous discussions:

https://discussions.apple.com/thread/7254934?start=0&tstart=0

https://discussions.apple.com/thread/7200751

http://nerdr.com/bootcamp-partition-lost-repairing-mac-partitions/

but none of them made any result.

I guess I should do some magic with gdisk and the section numbers but I'm not enough by myself to do that, so could you please help me? I can post any result of the gdisk commands to make this work.

Thanks!

Posted on Oct 7, 2015 1:34 PM

Reply

Answer 1

Loner T

Level 9

59,471 points

Oct 7, 2015 3:36 PM in response to profendre

Can you use Boot Camp disappeared after El Capitan update as a reference and run a Testdisk scan?

Reply

Answer 2

profendre Author

Level 1

0 points

Oct 8, 2015 3:05 AM in response to Loner T

Hi Loner T,

I saw you helped a lot of people in this problem - how did you get this knowledge??:)

Anyway, I started to run a testdisk scan.

After the "Proceed" part of the EFI, I see the following:

After I hit analyse:

After a long time it finally ended with the following result:

Reply

Answer 3

Loner T

Level 9

59,471 points

Oct 8, 2015 6:27 AM in response to profendre

This is a list of unrecoverable partitions. Press Return/Enter to Continue and you should see a list of viable partitions.

Reply

Answer 4

profendre Author

Level 1

0 points

Oct 8, 2015 7:29 AM in response to profendre

Okay, then I hit continue, here's the result:

Reply

Answer 5

Loner T

Level 9

59,471 points

Oct 8, 2015 8:42 AM in response to profendre

1. Can you post the output of

sudo gpt -vv -r show /dev/disk0

2. Can you scroll down to second MS Data entry and use 'P' to list files? Do you get output similar to the following?

Reply

Answer 6

profendre Author

Level 1

0 points

Oct 8, 2015 8:48 AM in response to Loner T

Output of 1. (sudo gpt -vv -r show /dev/disk0:

Output of the file lists of second MS Data entry (I can see the files):

Reply

Answer 7

Loner T

Level 9

59,471 points

Oct 8, 2015 8:56 AM in response to profendre

Please scroll down and check if you can see System Volume Information.

Reply

Answer 8

profendre Author

Level 1

0 points

Oct 8, 2015 8:58 AM in response to Loner T

I can see that:

Reply

Answer 9

Loner T

Level 9

59,471 points

Oct 8, 2015 9:04 AM in response to profendre

Your partition table will look like the following...

GPT 3 Start	GPT 3 Size	GPT 3 End	NTFS Start	Sector Offset	NTFS Size	NTFS End	Sector Offset (MB)	NTFS(Gb)	Disk End	Disk Difference
234784640	1269536	236054176	236054528	352	254179321	490233848	0	121.20	490234752	904

Can you use the NTFS Start and Size (with the '+') as shown in the discussion that I provided in steps 7 and 8 respectively and execute both sets of steps?

Reply