Bootcamp not working after Yosemite 10.10.3 update

Question

king_hil Author

Level 1

0 points

Bootcamp not working after Yosemite 10.10.3 update

I too have lost the ability to boot into windows/bootcamp - only Mac & recovery are displayed at startup.

Below are my results for the same set of instructions.

What does it indicate?

Thank you!

Hils-MacBook-Pro-2:~ king_hil$ diskutil list

/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 175.0 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data 50.0 GB disk0s4

Hils-MacBook-Pro-2:~ king_hil$ diskutil cs list

No CoreStorage logical volume groups found

Hils-MacBook-Pro-2:~ king_hil$ sudo gpt -vv -r show /dev/disk0

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 341796872 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

342206512 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

343476048 49103024

392579072 97654784 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

490233856 863

490234719 32 Sec GPT table

490234751 1 Sec GPT header

Hils-MacBook-Pro-2:~ king_hil$ sudo fdisk /dev/disk0

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 - 341796872] HFS+

3: AB 1023 254 63 - 1023 254 63 [ 342206512 - 1269536] Darwin Boot

4: 0C 1023 254 63 - 1023 254 63 [ 392579072 - 97654784] Win95 FAT32L

Hils-MacBook-Pro-2:~ king_hil$ sudo fdisk /dev/disk0

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 - 341796872] HFS+

3: AB 1023 254 63 - 1023 254 63 [ 342206512 - 1269536] Darwin Boot

4: 0C 1023 254 63 - 1023 254 63 [ 392579072 - 97654784] Win95 FAT32L

Hils-MacBook-Pro-2:~ king_hil$ sudo dd if=/dev/rdisk0s4 count=1 2>/dev/null | hexdump -C

00000000 be b7 90 5b dc 2d 75 3f bc f2 56 7b d7 ee 87 19 |...[.-u?..V{....|

00000010 b9 cd de 96 1f af c7 a9 ef 83 eb 21 fa 90 7e a2 |...........!..~.|

00000020 31 1a 9c e9 c3 ea c9 78 78 3f 02 1f 31 0f 54 90 |1......xx?..1.T.|

00000030 26 4d d9 a3 e1 a9 7f f4 f7 0f 65 e6 1e 6b fb c1 |&M........e..k..|

00000040 a6 13 bf 5e 52 89 ef 07 a5 d8 4b 32 86 93 94 09 |...^R.....K2....|

00000050 db 49 d6 84 6f 7f 51 54 fc a4 70 22 7b a2 78 a2 |.I..o.QT..p"{.x.|

00000060 76 52 b3 1f 62 68 62 72 d2 b6 17 7e be 8b d7 ff |vR..bhbr...~....|

00000070 c5 df 3b 5a f8 4b 71 2f 38 c3 4e 36 6f e6 cb f7 |..;Z.Kq/8.N6o...|

00000080 15 f2 8a 7f a5 bd e5 bd a3 aa 79 b5 bc 3a 5e 03 |..........y..:^.|

00000090 af f1 d7 c2 db 3e 1d 4e df a9 ef 14 d7 94 e0 74 |.....>.N.......t|

000000a0 3d 85 62 4a 71 4a 7b ca 70 ca 6c 9a be 17 2c bb |=.bJqJ{.p.l...,.|

000000b0 3f 29 17 31 95 30 2d ec 1d a9 92 a9 da 69 cd 54 |?).1.0-......i.T|

000000c0 c7 b4 69 6a 6c 6a 7e 6a b5 77 24 57 a7 ff 8c c0 |..ijlj~j.w$W....|

000000d0 2c 78 16 31 a3 32 a3 33 83 72 c6 62 2f 28 8f 59 |,x.1.2.3.r.b/(.Y|

000000e0 de 4c c4 ac 60 26 7d 26 0f d2 a2 69 9b 35 ce 8c |.L..`&}&...i.5..|

000000f0 cd 2c 60 24 64 31 c7 d1 49 64 1e 3a 27 3b a7 3c |.,`$d1..Id.:';.<|

00000100 a7 35 67 38 4f e9 e4 3e e7 3f 17 bd 0f 2e 7d ae |.5g8O..>.?....}.|

00000110 60 ae 7c ae b1 57 64 fa e7 c6 e6 e6 1d 2d bc 3a |`.|..Wd......-.:|

00000120 57 0b dc 0b 62 db 21 51 0b ea 0b 7a f6 39 2f f8 |W...b.!Q...z.9/.|

00000130 ee 83 89 5d 14 2e 64 2e 14 2f d4 2d 6a 17 ba 17 |...]..d../.-j...|

00000140 cd 0b d3 0b cb 0b db cb f1 d2 69 40 5f d0 18 89 |..........i@_...|

00000150 25 b9 65 cc 92 c1 92 f9 92 e3 92 d7 52 d0 52 cc |%.e.........R.R.|

00000160 56 bc 6c 29 bf 53 f3 52 d7 d2 48 a7 c5 a5 9d d5 |V.l).S.R..H.....|

00000170 bb c2 be 22 b0 22 b5 8a 5a c5 ac 62 57 50 ae 52 |..."."..Z..bWP.R|

00000180 57 ec 57 dc 56 b9 2b 91 2b 29 ab b2 95 c2 95 aa |W.W.V.+.+)......|

00000190 55 cd 4a f7 ca c8 ca dc ca 9a cf d0 67 e6 e3 8f |U.J.........g...|

000001a0 ea 2a 27 0a ee 46 b1 61 5e 78 22 f7 c6 13 31 c7 |.*'..F.a^x"...1.|

000001b0 96 f3 f5 12 be 81 2d eb 55 a5 aa 37 a0 4d 1f d6 |......-.U..7.M..|

000001c0 58 f6 76 3a f3 0e 80 3c ab db a3 1a eb cd 64 6f |X.v:...<......do|

000001d0 18 d7 5d e7 a2 37 ef b2 7b 53 aa b1 37 6f 86 bf |..]..7..{S..7o..|

000001e0 a4 de de 3b ce aa b7 72 62 bd a8 53 ed ad 78 72 |...;...rb..S..xr|

000001f0 4f 6a f6 be b8 f8 cd 13 79 3d 99 9a cd 0b b4 bd |Oj......y=......|

00000200

MacBook Pro with Retina display, OS X Yosemite (10.10.3)

Posted on Apr 17, 2015 2:47 PM

Reply

Answer 1

Loner T

Level 9

59,471 points

Apr 17, 2015 4:18 PM in response to king_hil

The gap between GPT3 and GPT4 needs to be scanned for a 'lost' NTFS partition. Please see Bootcamp partition missing after yosemite installation as a reference.

Reply

Answer 2

king_hil Author

Level 1

0 points

Apr 18, 2015 2:41 AM in response to Loner T

I downloaded and ran TestDisk.

Below are a few screen shots. I'm not sure what I'm doing.

All your help so far is appreciated Loner T

Reply

Answer 3

Loner T

Level 9

59,471 points

Apr 18, 2015 6:33 AM in response to king_hil

Your GPT Gap starts at 343476048 and you have two MS Data entries at 368027648 and 368027655 which are the most likely candidates.

Use only up/down arrow keys, do not use left/right arrow keys. Use 'P - List Files' and you are looking for Testdisk output which is similar to

Reply

Answer 4

king_hil Author

Level 1

0 points

Apr 21, 2015 1:53 PM in response to Loner T

I'm sorry, you lost me.

Which command would I enter in testdisk?

I've browsed the link you provided - unsure of starting point.

Thank you!

Reply

Answer 5

Loner T

Level 9

59,471 points

Apr 21, 2015 3:54 PM in response to king_hil

Scroll up to the first MS Data entry. Type P (- List Files). Do you get a listing of familiar files? The two entries with the last number being 122206201 look the most promising.

Reply

Answer 6

king_hil Author

Level 1

0 points

Apr 22, 2015 2:50 AM in response to Loner T

Got back to this list after a quick search

When pressing P on the D MS Data partitions, I get the following:

I opened a new terminal window (basic), and entered and received the following:

Reply

Answer 7

Loner T

Level 9

59,471 points

Apr 22, 2015 5:13 AM in response to king_hil

Please install GPT Fdisk from http://sourceforge.net/projects/gptfdisk/.

Using your screen shots, here is a table. Please verify.

GPT 3 Start	GPT 3 Size	GPT 3 End	NTFS Start	Sector Offset	NTFS Size	NTFS End	Sector Offset (MB)
342206512	1269536	343476048	368027648	24551600	122206201	490233848	11,988

My concern is that you have roughly 12GB unaccounted for in the gap. Before you make any changes, do you recall events that led up to the missing Windows partition?

Reply

Answer 8

king_hil Author

Level 1

0 points

Apr 22, 2015 11:24 AM in response to Loner T

Nothing abnormal on the Mac side, other than the 10.10.3 update.

Typical Office product creation and editing.

Installation of Stata - a statistical analysis program. Nothing close to 12GB in installation or data files.

In Windows, I deleted several large video files. This could easily be 12GB.

Reply

Answer 9

Loner T

Level 9

59,471 points

Apr 22, 2015 1:59 PM in response to king_hil

Leave your Testdisk display and start a new Terminal Window. Please use the following steps.

You need to use the following steps. If you see any error messages during the following steps, please stop and post back here with the error message. The following steps have values from your Testdisk output (and you can verify) in Steps 7 and 8.

Rebuild GPT4 using start/end offsets

Sudo gdisk /dev/rdisk0
P (print the full list of parts)
D (delete)
4 (part 4)
N (new part)
4 (part 4)
368027648 - Start offset in bytes (start point for Bootcamp part)
+122206201 (Size offset as opposed to End offset)
0700 (Windows part type)
P (print list of all parts just to see what changes will be made)
W (Write the new GPT)
Y (Yes! really write the new GPT)

This will delete and re-write the GPT partition info for /dev/disk0s4.

Rebuild MBR to match the new GPT information thus resetting the Hybrid MBR. Use defaults for other questions (like partition codes). The only values that need modifications are the Boot flags and step 6. Accept all other defaults that Gdisk offers.

Sudo gdisk /dev/disk0
P (Print list of parts)
R (Recover)
H (chooses Hybrid)
Partitions numbers to be hybridized: 2 3 4
Y (Good for GRUB question)
N (part 2 boot flag)
N (part 3 boot flag)
Y (part 4 boot flag make NTFS bootable partition)
W (Write the new MBR)
Y (Yes! write the new MBR)
Reboot

Here is sample Q&A for the second set of Gdisk steps. If you are asked about protecting additional partitions/disk space, say no.

Place EFI GPT (0xEE) partition first in MBR (good for GRUB)? (Y/N): Y

Creating entry for GPT partition #2 (MBR partition #2)

Enter an MBR hex code (default AF): Press Enter/Return

Set the bootable flag? (Y/N): N

Creating entry for GPT partition #3 (MBR partition #3)

Enter an MBR hex code (default AB): Press Enter/Return

Set the bootable flag? (Y/N): N

Creating entry for GPT partition #4 (MBR partition #4)

Enter an MBR hex code (default 07): Press Enter/Return

Set the bootable flag? (Y/N): Y

Test 1 - Does Bootcamp Volume show up in Finder?

Test 2 - Can you see files in Bootcamp Volume?

Test 3 - Can you select Bootcamp in System Preferences -> Startup Disk?

Test 4 - If Test 3 is successful, select Bootcamp and Click Restart.

Reply