Bootcamp "The startup disk cannot be partitioned or restored to a single partition" error.

This should work in your case as well.

Run (only once)

diskutil eraseVolume jhfs+ BC1 disk0s3

diskutil eraseVolume jhfs+ BC2 disk0s4

diskutil mergePartitions jhfs+ BCMP disk0s3 disk0s4

diskutil list

If you only see disk0s3, then

diskutil eraseVolume fat32 BOOTCAMP disk0s3

and now run BC Assistant and click on Restore/Remove.

Hi Loner,

How about mine ..? thanks

Junmins-MacBook-Pro:~ junmin$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *250.1 GB
disk0

1: EFI EFI 209.7 MB
disk0s1

2: Microsoft Basic Data BOOTCAMP 187.4 GB
disk0s2

3: Apple_APFS Container disk1 62.3 GB disk0s5

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +62.3 GB disk1

Physical Store disk0s5

1: APFS Volume OS X 18.8 GB disk1s1

2: APFS Volume Preboot 20.6 MB disk1s2

3: APFS Volume Recovery 507.2 MB
disk1s3

4: APFS Volume VM 1.1 GB disk1s4

/dev/disk2 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: FDisk_partition_scheme *8.0 GB disk2

1: DOS_FAT_32 WININSTALL 8.0 GB disk2s1

Junmins-MacBook-Pro:~ junmin$ diskutil cs list

No CoreStorage logical volume groups found

Hi Loner T

I am facing the same problem. Could you please teach me what I need to do?

Last login: Sun Feb 4 10:22:15 on ttys000

urikus-iMac:~ luyu$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.0 TB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh HD 498.4 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Reserved 16.8 MB disk0s4

5: Microsoft Basic Data BOOTCAMP 500.0 GB disk0s5

6: Windows Recovery 843.1 MB disk0s6

/dev/disk1 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_partition_scheme *1.0 TB disk1

1: Apple_partition_map 32.3 KB disk1s1

2: Apple_HFS Mac 500.1 GB disk1s3

3: Windows_NTFS LuYu 500.0 GB disk1s4

urikus-iMac:~ luyu$ diskutil cs list

No CoreStorage logical volume groups found

urikus-iMac:~ luyu$

Assuming you want to erase and install/re-install Windows using BCAssistant, disconnect the external disk first. Run

diskutil eraseVolume jhfs+ BC1 disk0s4

diskutil eraseVolume jhfs+ BC2 disk0s5

diskutil eraseVolume jhfs+ BC3 disk0s6

diskutil mergePartitions jhfs+ BCMP disk0s4 disk0s6

diskutil list

If you only see disk0s4, then

diskutil eraseVolume fat32 BOOTCAMP disk0s4

and now run BC Assistant and try to Remove/Restore.

Hey LonerT, i'm facing a similar problem, just upgraded to High Sierra and deleted the bootcamp partition using Bootcamp assistant, and when trying to re-install Windows the BCAssitant keep sending me this message " The startup disk cannot be partitioned..."
this is the list:

Last login: Sun Feb 4 21:04:22 on ttys000

MBP-de-Thiago:~ Thiagoschin$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *750.2 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh HD 749.3 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Apple_Boot 650.0 MB disk0s4

MBP-de-Thiago:~ Thiagoschin$

MBP-de-Thiago:~ Thiagoschin$ diskutil cs list

Also my Time machine drive isn't working anymore, it won't read my HD and asks me to set up as a new one, but my files are all there.

Could you see if you can help me in some way? Thank you!

here's the list after reboot:

Last login: Sun Feb 4 22:16:38 on ttys000

MBP-de-Thiago:~ Thiagoschin$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *750.2 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh HD 749.3 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

MBP-de-Thiago:~ Thiagoschin$

MBP-de-Thiago:~ Thiagoschin$ sudo gpt -vv -r show /dev/disk0

Password:

gpt show: /dev/disk0: mediasize=750156374016; sectorsize=512; blocks=1465149168

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 1465149167

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 1463469952 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

1463879592 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

1465149128 7

1465149135 32 Sec GPT table

1465149167 1 Sec GPT header

Also not getting the message from BCAssistant.

Hello Loner T

I am having a similar problem with my Macbook.

I am trying to create an installation file for Windows 10 for my new PC I have built. I am trying to use Boot Camp to allow me to prepare the USB.

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *121.3 GB
disk0

1: EFI EFI 209.7 MB
disk0s1

2: Apple_HFS Macintosh HD 120.5 GB
disk0s2

3: Apple_Boot Recovery HD 650.0 MB
disk0s3

/dev/disk1 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: CCCOMA_X64FRE_EN-US... +4.7 GB disk1

When I typed in the command diskutil list this came up. When I typed diskutil cs list nothing came up.

If you could help me figure out why I am getting the "The startup disk must be formatted as a single Mac OS Extended (Journaled) volume or already partitioned by Boot Camp Assistant for installing Windows." message, that would be great!

Dear Loner T, i would be more than grateful if you can help me with the Boot camp. Please help. Terminal is listing the following:

diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *250.1 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh HD 70.0 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Reserved 16.8 MB disk0s4

5: Microsoft Basic Data BOOTCAMP 178.6 GB disk0s5

6: Windows Recovery 492.8 MB disk0s6

diskutil cs list

No CoreStorage logical volume groups found

Assuming you want to erase and install/re-install Windows using BCAssistant, run (do not run any command more than once, because you can lose data, post any error messages and stop)

diskutil eraseVolume jhfs+ BC1 disk0s4

diskutil eraseVolume jhfs+ BC2 disk0s5

diskutil eraseVolume jhfs+ BC3 disk0s6

diskutil mergePartitions jhfs+ BCMP disk0s4 disk0s6

diskutil list

If you only see disk0s4, then

diskutil eraseVolume fat32 BOOTCAMP disk0s4

and now run BC Assistant and try to Remove/Restore.

Hello Loner T , I have run that command and here is the output:

Repairing the partition map might erase disk0s1, proceed? (y/N) y

Started partition map repair on disk0

Checking prerequisites

Checking the partition list

Adjusting partition map to fit whole disk as required

Checking for an EFI system partition

Checking the EFI system partition's size

Checking the EFI system partition's file system

Checking the EFI system partition's folder content

Checking all HFS data partition loader spaces

Checking booter partitions

Checking booter partition disk0s3

Repairing file system

Checking Journaled HFS Plus volume

Checking extents overflow file

Checking catalog file

Checking multi-linked files

Checking catalog hierarchy

Checking extended attributes file

Checking volume bitmap

Checking volume information

Trimming unused blocks

The volume Recovery HD appears to be OK

File system check exit code is 0

Updating boot support partitions for the volume as required

Reviewing boot support loaders

Checking Core Storage Physical Volume partitions

Updating Windows boot.ini files as required

The partition map appears to be OK

Finished partition map repair on disk0

Hi Loner T - are you able to assist me as well?

I'm hoping to remove all partitions back to just a single volume. BCA has failed. I've tried erasing/modifying in Disk Utility to no avail (at the direction of Apple Care Support). Numerous contacts to support (and my own efforts to fix) have seemingly made my diskutil list unrecognizable to anything I can decipher, and support has now suggested I visit a store to resolve the issue. The soonest appointment is a week from now. Any assistance I can get before then would be great.. Or, if it's not salvageable, I'll just wait for my store appointment.

Here's the results of diskutil list.

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *2.0 TB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage MACHD 1.1 TB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Apple_HFS OSXRESERVED 7.9 GB disk0s4

5: Apple_HFS 523.2 MB disk0s5

6: EFI 104.9 MB disk0s6

7: Apple_HFS Untitled 16.8 MB disk0s7

8: Apple_HFS 523.2 MB disk0s8

9: EFI 104.9 MB disk0s9

10: Apple_HFS Untitled 914.1 GB disk0s10

11: Apple_Boot 134.2 MB disk0s11

/dev/disk1 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *121.3 GB disk1

1: EFI EFI 209.7 MB disk1s1

2: 7C3457EF-0000-11AA-AA11-00306543ECAC 121.1 GB disk1s2

/dev/disk2 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS MACHD +1.1 TB disk2

Logical Volume on disk0s2

3E9EEEF8-7A56-4587-85F6-25DE938E6ADC

Unencrypted

/dev/disk3 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_partition_scheme +36.8 MB disk3

1: Apple_partition_map 32.3 KB disk3s1

2: Apple_HFS Steam 36.7 MB disk3s2

You have a 2TB Fusion drive. A Reboot can switch disk0 and disk1, so ensure that you are pointing to the HDD (2TB) part. I will leave 'N' as place-holder in the following commands. You will need to determine if it is 1 or 0, based on the output. Your posted output has N as 0.

diskutil eraseVolume jhfs+ BC1 diskNs4

diskutil eraseVolume jhfs+ BC2 diskNs5

diskutil eraseVolume jhfs+ BC3 diskNs6

diskutil eraseVolume jhfs+ BC4 diskNs7

diskutil eraseVolume jhfs+ BC5 diskNs8

diskutil eraseVolume jhfs+ BC6 diskNs9

diskutil eraseVolume jhfs+ BC7 diskNs10

diskutil eraseVolume jhfs+ BC8 diskNs11

diskutil mergePartitions jhfs+ BCMP diskNs4 diskNs11

diskutil list

If you only see diskNs4, then

diskutil eraseVolume fat32 BOOTCAMP diskNs4

and now re-run BC Assistant and click on Remove/Restore.

Amazing. I should have asked you a lot sooner.

Anyway... I appreciate your time here. I noticed you've spent the last several years being active and supportive to various communities - thanks for that too.

It is also the case for me. Please help me how to deal with. The Boot camp doesnt allow me ta make a new partition and the Disk Utility doesn't detect any other partition. Here is the command

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *500.3 GB disk0

1: Apple_CoreStorage MacHD 499.4 GB disk0s1

2: Apple_Boot Recovery HD 650.0 MB disk0s2

/dev/disk1 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS MacHD +499.1 GB disk1

Logical Volume on disk0s1

6AA3C76E-2C06-44E7-9E58-56210CD89004

Unlocked Encrypted

/dev/disk2 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *7.8 GB disk2

1: EFI EFI 209.7 MB disk2s1

2: Apple_HFS Install macOS Sierra 7.5 GB disk2s2

I continue to have this issue as I'm attempting to remove and only use one partition.

sh-3.2# diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *251.0 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_APFS Container disk1 159.3 GB disk0s2

3: Apple_KernelCoreDump 655.5 MB disk0s3

4: Microsoft Basic Data BOOTCAMP 90.8 GB disk0s4

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +159.3 GB disk1

Physical Store disk0s2

1: APFS Volume MacOSx 121.3 GB disk1s1

2: APFS Volume Preboot 20.9 MB disk1s2

3: APFS Volume Recovery 509.8 MB disk1s3

4: APFS Volume VM 1.1 GB disk1s4

When I use the diskutil to format the Bootcamp partiton, BC still gives me the error. I'm using High Sierra on my mid 2014 MacbookPro