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

Post a new discussion and the output of

diskutil list

Beta OSs have additional issues. Can you boot from a regular released OS version, so we can fix the issue?

Can you post the output of

diskutil apfs list

Please post the output of

diskutil list

Do you still have the Kernel Core Dump partition on the disk?

Look at Step 2 in How to delete a hard-drive partition on a Mac - CNET .

Huuth wrote:

So now just do that last function? erase volume fat32....?

Yes, and then re-run BCA.

You do not seem to have a BC partition, but run

diskutil apfs resizeContainer disk1 0g

and check that you have the Container using the full 500g.

Loner T

I'm getting the same error message and want to make sure I'm deleting the correct item items. Can you look this over and give me some guidance?

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *500.3 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_APFS Container disk1 390.0 GB disk0s2

3: Microsoft Basic Data OSXRESERVED 8.0 GB disk0s3

4: Microsoft Basic Data BOOTCAMP 101.6 GB disk0s4

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +390.0 GB disk1

Physical Store disk0s2

1: APFS Volume Macintosh HD 279.6 GB disk1s1

2: APFS Volume Preboot 24.4 MB disk1s2

3: APFS Volume Recovery 520.8 MB disk1s3

4: APFS Volume VM 3.2 GB disk1s4

/dev/disk2 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.0 TB disk2

1: EFI EFI 209.7 MB disk2s1

2: Apple_HFS Charles_Lundy 340.0 GB disk2s2

3: Apple_HFS TimeMachine 659.7 GB disk2s3

Chuck

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

The reason you are getting the partitions you have when you try to install Windows is due to an external storage unit being connected. Disconnect all external storage, run

How to reset the System Management Controller (SMC) on your Mac - Apple Support

How to reset NVRAM on your Mac - Apple Support

and try to install Windows.

• 2015 and later Macs do not need external storage.
• 2012-2014 Macs need a USB2 flash drive and a Windows DVD or an equivalent ISO.
• 2011 and older Macs need to use the built-in Optical drive. If they do not have a built-in Optical drive, then external Optical drive is supported on such models.
• Bootcamp drivers can be downloaded to a USB2 flash drive unless you use Macs which came with Grey restore DVDs, which also contain corresponding BC drivers. Most of these support Windows XP only.

Disks are renumbered at reboot. The underlying GPT index is used to order the slices.

Reboot and check the ordering and modify your merge command as appropriate, before you use it, otherwise you will lose data.

If there are not in order, post the output of

sudo gpt -vv -r show /dev/disk0

/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 142.0 GB
disk0s2

3: Microsoft Basic Data OSXRESERVED 8.0 GB disk0s3

4: Microsoft Basic Data BOOTCAMP 100.8 GB
disk0s4

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +142.0 GB
disk1

Physical Store disk0s2

1: APFS Volume Macintosh HD 58.1 GB disk1s1

2: APFS Volume Preboot 20.8 MB disk1s2

3: APFS Volume Recovery 517.8 MB
disk1s3

4: APFS Volume VM 3.2 GB disk1s4

/dev/disk2 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: CCCOMA_X64FRE_EN-US... +4.7 GB disk2

I ran it, now it is listing

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *500.3 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_APFS Container disk1 249.7 GB disk0s2

3: Apple_HFS BC1 134.2 MB disk0s3

4: Apple_HFS BC2 249.7 GB disk0s4

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +249.7 GB disk1

Physical Store disk0s2

1: APFS Volume Macintosh HD 111.6 GB disk1s1

2: APFS Volume Preboot 21.4 MB disk1s2

3: APFS Volume Recovery 518.1 MB disk1s3

4: APFS Volume VM 1.1 GB disk1s4

It shows bootcamp 1 and 2 now tho and BC assistant does not let me check the box to remove or restore windows.

/dev/disk0 (internal):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme 500.3 GB
disk0

1: EFI EFI 314.6 MB
disk0s1

2: Apple_APFS Container disk1 282.0 GB
disk0s2

3: Microsoft Basic Data OSXRESERVED 8.0 GB disk0s3

4: Apple_HFS BC2 100.9 GB
disk0s4

5: Apple_HFS BC1 108.7 GB
disk0s5

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +282.0 GB
disk1

Physical Store disk0s2

1: APFS Volume Macintosh HD 225.5 GB
disk1s1

2: APFS Volume Preboot 21.4 MB disk1s2

3: APFS Volume Recovery 519.0 MB
disk1s3

4: APFS Volume VM 1.1 GB disk1s4