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

In Terminal run

diskutil eraseVolume fat32 BOOTCAMP disk0s3

and retry removing the partition using BC Assistant only. Do not use Disk Utility.

Post the output of

diskutil list

Please post a text version of

diskutil apfs list

Please post the output of

diskutil list

Are you running a Beta release of macOS?

You are running a Beta release of macOS, as indicated by the Kernel Coredump partition. You will need to run a publicly-released version of macOS, before this can be corrected.

Post the output of

diskutil apfs list

Run

diskutil eraseVolume jhfs+ BC1 disk0s3

Does this produce and error? If it does, please run a SMC Reset and test if you can eraseVolume disk0s3.

Can you post the output of

diskutil list

Run

diskutil apfs resizeContainer disk1 0g

and post the output.

Before you start erasing/merging partitions, please post the output of

diskutil list

for validation. The commands may need modification to suit your specific layout.

Disk2 is not related to your issue.

• Step 3 (if BC Assistant fails to reclaim disk space, only on an APFS file system)

diskutil apfs resizeContainer disk1 0g

Kotaryp155 wrote:

I now show - Macintosh HD, BOOTCAMP, BOOTCAMP in diskutility. Macintosh HD 400GB APFS Volume APFS (Encrypted), BOOTCAMP 99.59 GB PCI Internal Physical Volume Windows NT File System (NTFS), BOOTCAMP 471.9 MB PCI Internal Physical Volume MS-DOS (FAT32). When I went back to Boot Camp Assistant however after running the diskutil eraseVolume fat32 BOOTCAMP disk0s4 from Terminal, I am seeing the same error message as before.

Prior to running - in diskutility, I had Macintosh HD 400GB APFS Volume APFS (Encrypted), BOOTCAMP 99.59 GB PCI Internal Physical Volume Windows NT File System (NTFS), and a disk0s4 that was greyed out.

These two volumes need to merged before you can use BCA to Remove/restore. Please post the output of diskutil list and I can provide the commands to correctly merge them.

No, you cannot use the same steps. Updated steps are

diskutil eraseVolume jhfs+ BC1 disk0s4

diskutil eraseVolume jhfs+ BC2 disk0s5

diskutil mergePartitions jhfs+ BCMP disk0s3 disk0s5

diskutil list

If you only see dsk0s3, then

diskutil eraseVolume fat32 BOOTCAMP disk0s3

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

Once you have space back in the Container, then recreate a partition for data and restore Data.

philip99song wrote:

Hello LonerT,

I thought this worked but I guess I accidently tried to reinstall bootcamp again because it gave me an error. What is the correct command this time? Sorry for making you type all of this and thank you so much for the help.

/dev/disk0 (internal):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme 251.0 GB
disk0

1: EFI EFI 314.6 MB
disk0s1

2: Apple_APFS Container disk1 154.0 GB
disk0s2

3: Microsoft Basic Data OSXRESERVED 8.0 GB disk0s6

4: Microsoft Basic Data BOOTCAMP 39.9 GB disk0s4

5: Apple_HFS BC1 48.4 GB disk0s3

The disk slices are out of order, can you reboot and check if the order is renumbered?