Bootcamp booting clobbered by Yosemite upgrade

Question

Level 1

17 points

Bootcamp booting clobbered by Yosemite upgrade

I've enjoyed being able to boot into OSX Mavericks or Windows 8.1 for the past year on my MBP (mid 2012, single 500GB SSD) but I recently performed the Yosemite upgrade. The resulting OSX installation appears to work fine but when I hold down the Option key after the chime the option to boot from Bootcamp Windows is missing. Worse, when I set "Startup Disk" to Bootcamp Windows the result fails.

@Loner T usually requests the following Terminal results so here they are:

Last login: Sun Sep 20 22:09:22 on ttys000

My-MacBook-Pro:~ me$ diskutil list

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *512.1 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage 255.3 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data BOOTCAMP 255.5 GB disk0s4

/dev/disk1

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD *254.9 GB disk1

Logical Volume on disk0s2

F6545BAB-5B31-4838-A188-C59D210B12FB

Unencrypted

==========

My-MacBook-Pro:~ me$ diskutil cs list

CoreStorage logical volume groups (1 found)

|

+-- Logical Volume Group B8FA8874-F8C3-4EC1-8F53-0F555EDFC166

=========================================================

Name: Macintosh HD

Status: Online

Size: 255250432000 B (255.3 GB)

Free Space: 18907136 B (18.9 MB)

|

+-< Physical Volume 84E5E470-49E8-4585-AA1D-397BDEA61A3D

| ----------------------------------------------------

| Index: 0

| Disk: disk0s2

| Status: Online

| Size: 255250432000 B (255.3 GB)

|

+-> Logical Volume Family E409753F-A5B6-4DAC-BF6F-17CE4956E11E

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

Encryption Status: Unlocked

Encryption Type: None

Conversion Status: NoConversion

Conversion Direction: -none-

Has Encrypted Extents: No

Fully Secure: No

Passphrase Required: No

|

+-> Logical Volume F6545BAB-5B31-4838-A188-C59D210B12FB

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

Disk: disk1

Status: Online

Size (Total): 254879203328 B (254.9 GB)

Conversion Progress: -none-

Revertible: Yes (no decryption required)

LV Name: Macintosh HD

Volume Name: Macintosh HD

Content Hint: Apple_HFS

==========

My-MacBook-Pro:~ me$ sudo gpt -vv -r show /dev/disk0

Password:

gpt show: /dev/disk0: mediasize=512110190592; sectorsize=512; blocks=1000215216

gpt show: /dev/disk0: PMBR at sector 0

gpt show: /dev/disk0: Pri GPT at sector 1

gpt show: /dev/disk0: Sec GPT at sector 1000215215

start size index contents

0 1 PMBR

1 1 Pri GPT header

2 32 Pri GPT table

34 6

40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B

409640 498536000 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

498945640 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

500215176 632

500215808 499077120 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

999292928 922255

1000215183 32 Sec GPT table

1000215215 1 Sec GPT header

==========

My-MacBook-Pro:~ me$ sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 62260/255/63 [1000215216 sectors]

Signature: 0xAA55

Starting Ending

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

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

1: EE 1023 254 63 - 1023 254 63 [ 1 - 1000215215] <Unknown ID>

2: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

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

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

I would appreciate help getting Bootcamp booting again.

Posted on Sep 20, 2015 8:43 PM

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Answer 1

Loner T

Level 9

59,471 points

Sep 21, 2015 4:24 AM in response to trwd

Based on what you have posted, you seem to have an EFI installation. Your Mac does not fully support UEFI standard. Can you run msinfo32 and check of the following information?

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Answer 2

trwd Author

Level 1

17 points

Sep 21, 2015 7:01 AM in response to Loner T

Thank you for replying, Loner T.

Perhaps I misunderstand your request to run MSINFO32 but that's a Windows program. The cause of this thread is that I am no longer able to boot into Windows on the MBP. I can see the contents of the Bootcamp partition in Finder so if there's a file I can look for in there, that is possible. But running any Windows programs is not possible, to my knowledge.

FYI, during my first attempt to upgrade from Mavericks to Yosemite it errored out citing “a mismatch between the MBR and GPT partition maps…”

I was able to fix it. See this thread. That experience gave me the impression that the Windows installation uses MBR. Between fixing the mismatch and running the Yosemite installer I booted into and used both OSX and Windows 8.1 several times with no probs.

Thanks again!

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Answer 3

Loner T

Level 9

59,471 points

Sep 21, 2015 7:41 AM in response to trwd

Can you post the output of

sudo dd if=/dev/rdisk0s4 count=1 2>/dev/null | hexdump -C

Macs prior to Late 2013 models use Hybrid MBR to support Windows. Later Macs can support both EFI and MBR methods.

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Answer 4

trwd Author

Level 1

17 points

Sep 21, 2015 9:39 AM in response to Loner T

Model Identifier: MacBookPro9,1

Last login: Mon Sep 21 11:31:52 on console

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

Password:

00000000 eb 52 90 4e 54 46 53 20 20 20 20 00 02 08 00 00 |.R.NTFS .....|

00000010 00 00 00 00 00 f8 00 00 3f 00 ff 00 00 b0 d0 1d |........?.......|

00000020 00 00 00 00 80 00 80 00 ff 4f bf 1d 00 00 00 00 |.........O......|

00000030 00 00 0c 00 00 00 00 00 02 00 00 00 00 00 00 00 |................|

00000040 f6 00 00 00 01 00 00 00 6a 35 e9 ee 6e e9 ee a8 |........j5..n...|

00000050 00 00 00 00 fa 33 c0 8e d0 bc 00 7c fb 68 c0 07 |.....3.....|.h..|

00000060 1f 1e 68 66 00 cb 88 16 0e 00 66 81 3e 03 00 4e |..hf......f.>..N|

00000070 54 46 53 75 15 b4 41 bb aa 55 cd 13 72 0c 81 fb |TFSu..A..U..r...|

00000080 55 aa 75 06 f7 c1 01 00 75 03 e9 dd 00 1e 83 ec |U.u.....u.......|

00000090 18 68 1a 00 b4 48 8a 16 0e 00 8b f4 16 1f cd 13 |.h...H..........|

000000a0 9f 83 c4 18 9e 58 1f 72 e1 3b 06 0b 00 75 db a3 |.....X.r.;...u..|

000000b0 0f 00 c1 2e 0f 00 04 1e 5a 33 db b9 00 20 2b c8 |........Z3... +.|

000000c0 66 ff 06 11 00 03 16 0f 00 8e c2 ff 06 16 00 e8 |f...............|

000000d0 4b 00 2b c8 77 ef b8 00 bb cd 1a 66 23 c0 75 2d |K.+.w......f#.u-|

000000e0 66 81 fb 54 43 50 41 75 24 81 f9 02 01 72 1e 16 |f..TCPAu$....r..|

000000f0 68 07 bb 16 68 52 11 16 68 09 00 66 53 66 53 66 |h...hR..h..fSfSf|

00000100 55 16 16 16 68 b8 01 66 61 0e 07 cd 1a 33 c0 bf |U...h..fa....3..|

00000110 0a 13 b9 f6 0c fc f3 aa e9 fe 01 90 90 66 60 1e |.............f`.|

00000120 06 66 a1 11 00 66 03 06 1c 00 1e 66 68 00 00 00 |.f...f.....fh...|

00000130 00 66 50 06 53 68 01 00 68 10 00 b4 42 8a 16 0e |.fP.Sh..h...B...|

00000140 00 16 1f 8b f4 cd 13 66 59 5b 5a 66 59 66 59 1f |.......fY[ZfYfY.|

00000150 0f 82 16 00 66 ff 06 11 00 03 16 0f 00 8e c2 ff |....f...........|

00000160 0e 16 00 75 bc 07 1f 66 61 c3 a1 f6 01 e8 09 00 |...u...fa.......|

00000170 a1 fa 01 e8 03 00 f4 eb fd 8b f0 ac 3c 00 74 09 |............<.t.|

00000180 b4 0e bb 07 00 cd 10 eb f2 c3 0d 0a 41 20 64 69 |............A di|

00000190 73 6b 20 72 65 61 64 20 65 72 72 6f 72 20 6f 63 |sk read error oc|

000001a0 63 75 72 72 65 64 00 0d 0a 42 4f 4f 54 4d 47 52 |curred...BOOTMGR|

000001b0 20 69 73 20 63 6f 6d 70 72 65 73 73 65 64 00 0d | is compressed..|

000001c0 0a 50 72 65 73 73 20 43 74 72 6c 2b 41 6c 74 2b |.Press Ctrl+Alt+|

000001d0 44 65 6c 20 74 6f 20 72 65 73 74 61 72 74 0d 0a |Del to restart..|

000001e0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|

000001f0 00 00 00 00 00 00 8a 01 a7 01 bf 01 00 00 55 aa |..............U.|

00000200

My-MacBook-Pro:~ me$

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Answer 5

Loner T

Level 9

59,471 points

Sep 21, 2015 10:22 AM in response to trwd

trwd wrote:

The resulting OSX installation appears to work fine but when I hold down the Option key after the chime the option to boot from Bootcamp Windows is missing.

This can happen if the installation is a BIOS/MBR and the MBR is missing. How do you get to start Windows if this option is missing?

Worse, when I set "Startup Disk" to Bootcamp Windows the result fails.

This is because the bless command has failed. Do you have any third-partty NTFS software? Can you also check Applications -> Utilities -> Console for any bootcamp-related entries.

What year/model is Mac? Any Mac prior to Late 2013 models, is usually a MBR/BIOS installation and requires a Hybrid MBR, which is missing in your case. Later models support both UEFI and BIOS booting. EFI Boot also requires a MSR partition on the GPT-only disks.

Can you also run the following two procedures and test?

Resetting the System Management Controller (SMC) on your Mac - Apple Support

How to Reset NVRAM on your Mac - Apple Support

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Answer 6

trwd Author

Level 1

17 points

Sep 22, 2015 12:11 PM in response to Loner T

Thank you for replying, Loner T. Your reply puzzles me.

This can happen if the installation is a BIOS/MBR and the MBR is missing. How do you get to start Windows if this option is missing?

Like I initially wrote, the option to boot the Bootcamp partition is no longer available by holding down Option during boot so I cannot "start Windows".

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

Also, you ask:

What year/model is Mac?

I can't think of anything else to add other than what I've posted previously in this thread:

my MBP (mid 2012, single 500GB SSD)

Model Identifier: MacBookPro9,1

If there's some other identifier please let me know how to find it.

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

Your recent reply asks: "Do you have any third-partty NTFS software? Can you also check Applications -> Utilities -> Console for any bootcamp-related entries."

I have no third-party NTFS software and cannot think of a reason I'd need it at this point. Please explain how it's relevant.

To answer the second half of your question, here is a screen cap of all references to Bootcamp in Console.

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

Regarding your last request that I perform the following:

Resetting the System Management Controller (SMC) on your Mac - Apple Support

How to Reset NVRAM on your Mac - Apple Support

I've already tried resetting NVRAM, with no change in the result, but I'm reluctant to reset the SMC because I don't know how it might affect my ability to use OSX.

I'm curious why you're not replying to my post like other similar (appearing) posts.

Is there something about the reports and screen caps I've posted above that indicate anything special in my case?

My impression based on conversations with a couple Apple Senior Advisors is my Bootcamp's boot manager was corrupted by the Yosemite upgrade -- a problem that they have no simple fix or tool for (amazingly enough, unlike the countless tools available in Windows like FDISK, EasyBCD, Paragon software, etc.).

I appreciate your willingness to help!

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Answer 7

Loner T

Level 9

59,471 points

Sep 22, 2015 2:14 PM in response to trwd

The Apple Technical Support did not look far enough. If you are unable to see Windows in Startup Disk or unable to boot, the Yosemite Recovery Upgrade wiped your MBR. It can be easily recreated. Please download GPT Fdisk from http://sourceforge.net/projects/gptfdisk/ and i will provide the steps.

Your NTFS Bootcamp/Windows has the proper header as shown by the DD command.

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Answer 8

trwd Author

Level 1

17 points

Sep 22, 2015 8:21 PM in response to Loner T

Thank you. I have GDisk.

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Answer 9

Loner T

Level 9

59,471 points

Sep 23, 2015 3:21 AM in response to trwd

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 10. Accept all other defaults that Gdisk offers. Please see thesample Q&A as an example. These steps can be repeated if you make a mistake before you get to Step 12, otherwise start from Step 1 for these steps. Step 6 has numbers which are typed with a space between the numbers. Please see the sample Q&A before you execute these steps.

Sudo gdisk /dev/rdisk0
P (Print list of parts)
R (Recover)
O (print current Hybrid MBR)
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)
O (print current Hybrid MBR)
W (Write the new MBR)
Y (Yes! write the new MBR)
Reboot

Here is sample Q&A for this section. Please notice the Press Enter/Return.

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

Some of the following tests (1,2) may already be working in your specific case.

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.

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Answer 10

trwd Author

Level 1

17 points

Sep 25, 2015 2:04 PM in response to Loner T

Thank you, Loner T. I had to travel the past couple days but am now ready to continue. Before making the changes you recommend I would like to make a backup image of my entire drive. Being a Windows IT person I am intimately familiar with imaging drives using programs like Terabyte Image and other tools, but I cannot find any equivalent tool for a dual-boot Mac that employs Bootcamp. For example, Stellar Disk Clone copies the Bootcamp partition but the resulting Bootcamp partition is not bootable or even NTFS any longer. Do you know of any imaging software that one can boot from a USB drive, clone or image a MBP system like mine, and end up with an actually usable dual-boot system?

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Answer 11

Loner T

Level 9

59,471 points

Sep 25, 2015 2:11 PM in response to trwd

You can try Winclone, CloneZilla or CampTune.

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Answer 12

trwd Author

Level 1

17 points

Sep 28, 2015 10:32 AM in response to Loner T

Thank you for the suggestions, Loner T. Of the programs you listed only Clonezilla might be able to copy the entire MBP drive and retain the ability to boot from OSX and Bootcamp. Since I'm a long time user of Terabyte's Image for Windows/DOS/Linux I'm currently experimenting with using it (aided by their Support people) to make a perfect clone of my MBP's internal drive before using GDisk to perform the mods you recommended earlier in this thread.

While looking at how my MBP's current 500GB SSD is portrayed by Disk Utility a question for you arises. Here's a screen cap of what I'm seeing.

If the top item in the left pane refers to the physical drive why is the "Capacity" not 512GB, which is the actual capacity of the drive?

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Answer 13

Loner T

Level 9

59,471 points

Sep 28, 2015 10:46 AM in response to trwd

Disk Utility does not represent this correctly. If you look at your diskutil cs list output,

The LVG "Macintosh HD" is 255GB, Bootcamp is a separate partition, which is another 250+ GB. The GPT command output also reflects the same state. Bootcamp is a NTFS partition/volume, while Macintosh HD is a LVG/LV combination. A LVG can contain more than LV. You should check with CloneZilla . It is unlikely that such tools understand the LVG/LV abstractions.

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Answer 14

trwd Author

Level 1

17 points

Sep 28, 2015 12:50 PM in response to Loner T

Thank you again for responding, Loner T. You're amazingly patient and helpful.

In your last reply you wrote,

"It is unlikely that such tools understand the LVG/LV abstractions."

Are you saying that Clonezilla and/or Terabyte's Image for Linux may not understand the LVG/LV abstractions?

The first clone I made using Terabyte's program will not boot, though its partition structure is identical. I disconnected the internal drive to prevent a GUID conflict (clone and original having the same GUID, which causes problems in Windows at least -- don't know about Apple).

Please confirm whether it is feasible to boot a MacBook Pro from an external USB drive when the internal drive is disconnected. (ignoring whether the copy is valid or bootable; just is it possible provided the external drive is a perfect copy of the original?)

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Answer 15

Loner T

Level 9

59,471 points

Sep 28, 2015 12:59 PM in response to trwd

Yes, a Mac will boot OSX from an external drive. See How to install OS X on an external drive connected to your Mac - Apple Support as an example. You can boot form the internal disk which si working, attach the clone a san external disk and use a utility like GPT or GPT Fdisk to examine GUIDs on each disk.

Clonezilla may use methods like U*ix DD to make an exact replica, including the GUIDs.

GPT Command

sudo gpt -vv -r show /dev/disk0

Password:

gpt show: /dev/disk0: mediasize=1000555581440; sectorsize=512; blocks=1954210120

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 1954210119

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 1448624648 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

1449034288 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

1450303824 1712

1450305536 503904256 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

1954209792 295

1954210087 32 Sec GPT table

1954210119 1 Sec GPT header

GPT Fdisk Commands

sudo gdisk -l /dev/disk0

GPT fdisk (gdisk) version 1.0.0

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.

Disk /dev/disk0: 1954210120 sectors, 931.8 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): 6ED0C429-00D1-4759-B50E-04B6FB80D0E3

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 1954210086

Partitions will be aligned on 8-sector boundaries

Total free space is 2013 sectors (1006.5 KiB)

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

1 40 409639 200.0 MiB EF00 EFI System Partition

2 409640 1449034287 690.8 GiB AF00 Customer

3 1449034288 1450303823 619.9 MiB AB00 Recovery HD

4 1450305536 1954209791 240.3 GiB 0700 BOOTCAMP

sudo gdisk /dev/disk0

GPT fdisk (gdisk) version 1.0.0

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/disk0: 1954210120 sectors, 931.8 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): 6ED0C429-00D1-4759-B50E-04B6FB80D0E3

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 1954210086

Partitions will be aligned on 8-sector boundaries

Total free space is 2013 sectors (1006.5 KiB)

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

1 40 409639 200.0 MiB EF00 EFI System Partition

2 409640 1449034287 690.8 GiB AF00 Customer

3 1449034288 1450303823 619.9 MiB AB00 Recovery HD

4 1450305536 1954209791 240.3 GiB 0700 BOOTCAMP

Command (? for help): i

Partition number (1-4): 1

Partition GUID code: C12A7328-F81F-11D2-BA4B-00A0C93EC93B (EFI System)

Partition unique GUID: 9BE44DE5-9AA9-4F22-9DDF-B6D13A28C14A

First sector: 40 (at 20.0 KiB)

Last sector: 409639 (at 200.0 MiB)

Partition size: 409600 sectors (200.0 MiB)

Attribute flags: 0000000000000000

Partition name: 'EFI System Partition'

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