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Question: Cant run High Sierra after Bootcamp windows 10 installation

Hi Guys,


I ran into trouble yesterday


I own a late 2012 Mac book pro, I have an SSD with High Sierra on it and HDD in optical drive bay which had an older Yosemite OS installed but I wasnt using that anymore.

I installed Windows 10 yesterday using Bootcamp, all went smoothly apart from I formatted BOOTCAMP partition to NTFS when asked during windows installation.

After setting up windows when I tried to boot into High Sierra, It could not. On OS selection screen at startup it was showing Windows and Yosemite OS but not the High Sierra which is on SSD drive.


I tried to access the SSD drive from Yosemite but It didnt shows in Finder and when I tried disk utility it is greyed out and I am not able to mount it.


I tried Internet recovery and same happened.


Unfortunately I didnt backup anything from High Sierra SSD before installing Windows 10 and I have really really important files on it. I cant risk reformatting and reinstalling as I wil lose my data.

I upgraded Yosemite to High Sierra as well but no luck.

My question is. Is there any way I can mount or access the hidden partition (appearing as disk0s2 in disk utility) by unconventional method?


Any help will be greatly appreciated.

MacBook Pro, macOS High Sierra (10.13.2)

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Dec 17, 2017 6:19 AM in response to Asim.C In response to Asim.C

There is no 'unconventional' method that will help you.


First, disconnect the HDD in the Optibay from the Logic Board, otherwise it will just cause more problems.

Second, install High Sierra with latest updates on an external disk, and boot from it.


Once you are booted in HS, post the output of


diskutil list


Be aware that your hardware configuration is not officially supported.

Dec 17, 2017 6:19 AM

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Dec 18, 2017 2:46 AM in response to Loner T In response to Loner T

I actually did work around and searching on internet I found this post with semi similar situation


disk utility - Partition type suddenly FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF, drive unmountable - Ask Different


Following the instructions I unmounted, removed and then re-added partitions by entering these codes.


Asims-MacBook-Pro:~ asim$ diskutil info /dev/disk1

Device Identifier: disk1

Device Node: /dev/disk1

Whole: Yes

Part of Whole: disk1

Device / Media Name: Ultra

Volume Name: Not applicable (no file system)

Mounted: Not applicable (no file system)

File System: None

Content (IOContent): GUID_partition_scheme

OS Can Be Installed: No

Media Type: Generic

Protocol: USB

SMART Status: Not Supported

Disk Size: 62.1 GB (62109253632 Bytes) (exactly 121307136 512-Byte-Units)

Device Block Size: 512 Bytes

Read-Only Media: No

Read-Only Volume: Not applicable (no file system)

Device Location: External

Removable Media: Removable

Media Removal: Software-Activated

Virtual: No

OS 9 Drivers: No

Low Level Format: Not supported

Asims-MacBook-Pro:~ asim$ sudo gpt remove -i 2 /dev/disk0

Password:

gpt remove: unable to open device '/dev/disk0': Resource busy

Asims-MacBook-Pro:~ asim$ diskutil umountDisk /dev/disk0

Unmount of all volumes on disk0 was successful

Asims-MacBook-Pro:~ asim$ udo gpt remove -i 2 /dev/disk0

-bash: udo: command not found

Asims-MacBook-Pro:~ asim$ sudo gpt remove -i 2 /dev/disk0

/dev/disk0s2 removed

Asims-MacBook-Pro:~ asim$ sudo gpt remove -i 3 /dev/disk0

gpt remove: unable to open device '/dev/disk0': Resource busy

Asims-MacBook-Pro:~ asim$ sudo gpt remove -i 3 /dev/disk0

gpt remove: unable to open device '/dev/disk0': Resource busy

Asims-MacBook-Pro:~ asim$ diskutil umountDisk /dev/disk0

Unmount of all volumes on disk0 was successful

Asims-MacBook-Pro:~ asim$ sudo gpt remove -i 3 /dev/disk0

/dev/disk0s3 removed

Asims-MacBook-Pro:~ asim$ sudo gpt -r show /dev/disk0

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
468452455


468862095 32 Sec GPT table


468862127 1 Sec GPT header

Asims-MacBook-Pro:~ asim$ sudo gpt add -b 409640 -i 2 -s 330078112 -t 7C3457EF-0000-11AA-AA11-00306543ECAC /dev/disk0

/dev/disk0s2 added

Asims-MacBook-Pro:~ asim$ diskutil umountDisk /dev/disk0

Unmount of all volumes on disk0 was successful

Asims-MacBook-Pro:~ asim$ sudo gpt add -b 330487808 -i 3 -s 138373120 -t EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 /dev/disk0

Password:

/dev/disk0s3 added

Asims-MacBook-Pro:~ asim$ diskutil mountDisk /dev/disk0

Volume(s) mounted successfully

Asims-MacBook-Pro:~ asim$

After that I was able to see SSD partition and succesfuly booted into my original High Sierra (Phew)

But My disk now looks very strange with all the partitions and I am no longer able to see and boot into windows 10 using bootcamp.

My current diskutil list is

Asims-MacBook-Pro:~ asimchughtai$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *240.1 GB
disk0

1: EFI EFI 209.7 MB
disk0s1

2: Apple_APFS Container disk1 169.0 GB
disk0s2

3: Microsoft Basic Data BOOTCAMP 70.8 GB disk0s3

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +169.0 GB
disk1

Physical Store disk0s2

1: APFS Volume Macintosh HD SSD 108.6 GB
disk1s1

2: APFS Volume Preboot 20.3 MB disk1s2

3: APFS Volume Recovery 520.8 MB
disk1s3

4: APFS Volume VM 1.1 GB disk1s4

/dev/disk2 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *62.1 GB disk2

1: EFI EFI 209.7 MB
disk2s1

2: Apple_HFS High Sierra 61.2 GB disk2s2

3: Apple_Boot Recovery HD 650.0 MB
disk2s3

Asims-MacBook-Pro:~ asimchughtai$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *240.1 GB
disk0

1: EFI EFI 209.7 MB
disk0s1

2: Apple_APFS Container disk1 169.0 GB
disk0s2

3: Microsoft Basic Data BOOTCAMP 70.8 GB disk0s3

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +169.0 GB
disk1

Physical Store disk0s2

1: APFS Volume Macintosh HD SSD 108.5 GB
disk1s1

2: APFS Volume Preboot 20.3 MB disk1s2

3: APFS Volume Recovery 520.8 MB
disk1s3

4: APFS Volume VM 1.1 GB disk1s4

It has created weird partitions now which is probably because I messed around.


Is there any way I can use Bootcamp partition for Windows 10 I think it is not bootable anymore....

Any Suggestion??

Dec 18, 2017 2:46 AM

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Dec 18, 2017 6:03 AM in response to Loner T In response to Loner T

Oh I understand..


Yes I can re-install Windows. I don't have any data on tat partition.


Any advise what should I do different this time before or during Windows installation to avoid running into same problem again..?


Many Thanks Loner T

Dec 18, 2017 6:03 AM

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Question: Cant run High Sierra after Bootcamp windows 10 installation