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

Dear Loner T,

I am experiencing the same issue as well, could you help me out too?

//diskutil list

/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 disk2 206.0 GB disk0s2

3: Microsoft Basic Data OSXRESERVED 8.0 GB disk0s3

4: Apple_APFS Container disk1 36.7 GB disk0s4

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +36.7 GB disk1

Physical Store disk0s4

/dev/disk2 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +206.0 GB disk2

Physical Store disk0s2

1: APFS Volume Macintosh HD 183.8 GB disk2s1

2: APFS Volume Preboot 21.9 MB disk2s2

3: APFS Volume Recovery 520.8 MB disk2s3

4: APFS Volume VM 1.1 GB disk2s4

//diskutil list

No CoreStorage logical volume groups found

APFS Containers (2 found)

|

+-- Container disk1 D4D698E8-FCE4-4242-A82F-F2EC388F3411

| ====================================================

| APFS Container Reference: disk1

| Capacity Ceiling (Size): 36684869632 B (36.7 GB)

| Capacity In Use By Volumes: 85106688 B (85.1 MB) (0.2% used)

| Capacity Available: 36599762944 B (36.6 GB) (99.8% free)

| |

| +-< Physical Store disk0s4 498D90B8-9B9E-408E-AD9E-81B544EC3356

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

| | APFS Physical Store Disk: disk0s4

| | Size: 36684869632 B (36.7 GB)

| |

| +-> No Volumes

|

+-- Container disk2 7C0A19E4-5E17-4B36-A04D-2D6941555D9D

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

APFS Container Reference: disk2

Capacity Ceiling (Size): 205999996928 B (206.0 GB)

Capacity In Use By Volumes: 186173960192 B (186.2 GB) (90.4% used)

Capacity Available: 19826036736 B (19.8 GB) (9.6% free)

|

+-< Physical Store disk0s2 45E3C46D-037A-4964-97CA-56ACFA574B3C

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

| APFS Physical Store Disk: disk0s2

| Size: 205999996928 B (206.0 GB)

|

+-> Volume disk2s1 661CFA5D-9D77-3C64-B998-29EA8C2D0B55

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

| APFS Volume Disk (Role): disk2s1 (No specific role)

| Name: Macintosh HD (Case-insensitive)

| Mount Point: /

| Capacity Consumed: 184423346176 B (184.4 GB)

| Encrypted: No

|

+-> Volume disk2s2 C30C1B51-2A37-43D4-9648-5B0A15FA74B2

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

| APFS Volume Disk (Role): disk2s2 (Preboot)

| Name: Preboot (Case-insensitive)

| Mount Point: Not Mounted

| Capacity Consumed: 21860352 B (21.9 MB)

| Encrypted: No

|

+-> Volume disk2s3 9AF600A8-D3FF-4AA2-8BD9-2DF67BA91C03

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

| APFS Volume Disk (Role): disk2s3 (Recovery)

| Name: Recovery (Case-insensitive)

| Mount Point: Not Mounted

| Capacity Consumed: 520765440 B (520.8 MB)

| Encrypted: No

|

+-> Volume disk2s4 F1E92B55-1D59-445A-8264-EDB6CB6B803B

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

APFS Volume Disk (Role): disk2s4 (VM)

Name: VM (Case-insensitive)

Mount Point: /private/var/vm

Capacity Consumed: 1073766400 B (1.1 GB)

Encrypted: No

Run

diskutil apfs deleteContainer D4D698E8-FCE4-4242-A82F-F2EC388F3411

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 T, thank you so much for the prompt reply, below are my results, am I doing it correctly?

I managed to merge it back to 250 GB, but when I tried to start Boot Camp Assistant to install Windows 10, I got this error despite having more than 60GB + of free space.

/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 250.7 GB disk0s2

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +250.7 GB disk1

Physical Store disk0s2

1: APFS Volume Macintosh HD 193.9 GB disk1s1

2: APFS Volume Preboot 22.7 MB disk1s2

3: APFS Volume Recovery 517.8 MB disk1s3

4: APFS Volume VM 1.1 GB disk1s4

hi loner t. I tried to run some of the commands you suggested, but it didn't fully work. I am now stuck at the following stage:

/dev/disk0 (internal):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme 1.0 TB disk0

1: EFI EFI 314.6 MB
disk0s1

2: Apple_APFS Container disk1 878.0 GB
disk0s2

3: Apple_APFS Container disk2 121.2 GB
disk0s3

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +878.0 GB
disk1

Physical Store disk0s2

1: APFS Volume Macintosh HD 336.9 GB
disk1s1

2: APFS Volume Preboot 23.2 MB disk1s2

3: APFS Volume Recovery 517.8 MB
disk1s3

4: APFS Volume VM 1.1 GB disk1s4

/dev/disk2 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +121.2 GB
disk2

Physical Store disk0s3

1: APFS Volume bc1 987.1 KB
disk2s1

Could you please tell me how to merge those two disks back together so I can do a clean Bootcamp install?

Your help is much appreciated.

Hi and thanks for your quick reply. Please see below:

APFS Containers (2 found)

|

+-- Container disk1 DE26BA8B-9E82-45E2-BB7F-E55CCF1B756E

|
====================================================

|
APFS Container Reference: disk1

|
Size (Capacity Ceiling): 878007263232 B (878.0 GB)

|
Minimum Size: 349637971968 B (349.6 GB)

|
Capacity In Use By Volumes:
338747011072 B (338.7 GB) (38.6% used)

|
Capacity Not Allocated: 539260252160 B (539.3 GB) (61.4% free)

|
|

|
+-< Physical Store disk0s2 6D31B57E-FAF0-4155-934C-22EAF42F9173

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

|
|
APFS Physical Store Disk:
disk0s2

|
|
Size: 878007263232 B (878.0 GB)

|
|

|
+-> Volume disk1s1 5A14A919-FE8E-3830-91F1-CD5B2A772FA0

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

|
|
APFS Volume Disk (Role):
disk1s1 (No specific role)

|
|
Name: Macintosh HD (Case-insensitive)

|
|
Mount Point: /

|
|
Capacity Consumed: 336935841792 B (336.9 GB)

|
|
FileVault: Yes (Unlocked)

|
|

|
+-> Volume disk1s2 F6FF13C2-025A-4CF9-8409-809EBA7B87AB

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

|
|
APFS Volume Disk (Role):
disk1s2 (Preboot)

|
|
Name: Preboot (Case-insensitive)

|
|
Mount Point: Not Mounted

|
|
Capacity Consumed: 23199744 B (23.2 MB)

|
|
FileVault: No

|
|

|
+-> Volume disk1s3 BFC29C93-5A04-4384-977F-C0FCF2B5280E

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

|
|
APFS Volume Disk (Role):
disk1s3 (Recovery)

|
|
Name: Recovery (Case-insensitive)

|
|
Mount Point: Not Mounted

|
|
Capacity Consumed: 517750784 B (517.8 MB)

|
|
FileVault: No

|
|

|
+-> Volume disk1s4 793505FA-2E0F-41CC-81D4-F49D0AB9A6F0

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

| APFS Volume Disk (Role):
disk1s4 (VM)

| Name: VM (Case-insensitive)

| Mount Point: /private/var/vm

| Capacity Consumed: 1073762304 B (1.1 GB)

| FileVault: No

|

+-- Container disk2 9B028BE4-C881-4A57-9543-AAB36C73BF50

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

APFS Container Reference: disk2

Size (Capacity Ceiling): 121198018560 B (121.2 GB)

Minimum Size: 371597312 B (371.6 MB)

Capacity In Use By Volumes:
127344640 B (127.3 MB) (0.1% used)

Capacity Not Allocated: 121070673920 B (121.1 GB) (99.9% free)

|

+-< Physical Store disk0s3 7D89C4A5-4DCF-4142-81C0-92D4DC241012

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

|
APFS Physical Store Disk:
disk0s3

|
Size: 121198018560 B (121.2 GB)

|

+-> Volume disk2s1 0725DA92-3644-3936-82A2-048C2E7C37EB

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

APFS Volume Disk (Role):
disk2s1 (No specific role)

Name: bc1 (Case-insensitive)

Mount Point: /Volumes/bc1

Capacity Consumed: 987136 B (987.1 KB)

FileVault: No

Run

diskutil apfs deleteVolume 0725DA92-3644-3936-82A2-048C2E7C37EB

diskutil apfs deleteContainer 9B028BE4-C881-4A57-9543-AAB36C73BF50

diskutil eraseVolume fat32 BOOTCAMP disk0s3

Now run BC Assistant and click on Remove/Restore.

You're amazing, that worked. Thank you so much.

Out of curiosity - where can I find out more about this? For instance, why did neither diskutil list nor diskutil apfs list show any reference to there being a 'fat32' formatted BOOTCAMP disk from what I can see, but instead showed APFS?

What made you want to run diskutil apfs list in the first place and why did you delete in the order Volume-Container-Volume.

Sorry, I don't expect a full answer, but I am curious to learn more about this.

Thanks for your help again!

Hey I have the same problem as everyone else I got this:

Last login: Sun Apr 22 07:42:23 on console

Yanns-MacBook-Pro:~ yannkull$ diskutil erasevolume fat32 bootcamp disk0s4

bootcamp does not appear to be a valid volume name for its file system

Yanns-MacBook-Pro:~ yannkull$ diskutil list

/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 174.0 GB
disk0s2

3: Microsoft Basic Data BOOTCAMP 76.2 GB disk0s3

4: Windows Recovery 513.8 MB
disk0s4

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +174.0 GB
disk1

Physical Store disk0s2

1: APFS Volume Macintosh HD 155.1 GB
disk1s1

2: APFS Volume Preboot 19.9 MB disk1s2

3: APFS Volume Recovery 517.8 MB
disk1s3

4: APFS Volume VM 1.1 GB disk1s4

Yanns-MacBook-Pro:~ yannkull$

Yanns-MacBook-Pro:~ yannkull$ diskutil cs list

No CoreStorage logical volume groups found

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.

Hello.

I finished the erase disk04 and disk05 steps, but could not merge them.

diskutil list

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.0 TB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_APFS Container disk1 702.0 GB disk0s2

3: Microsoft Basic Data BOOTCAMP 297.3 GB disk0s3

4: Microsoft Basic Data Untitled 471.9 MB disk0s4

5: Microsoft Basic Data Untitled 512.8 MB
disk0s5

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +702.0 GB
disk1

Physical Store disk0s2

1: APFS Volume Macintosh HD 527.6 GB disk1s1

2: APFS Volume Preboot 22.0 MB disk1s2

3: APFS Volume Recovery 517.8 MB
disk1s3

4: APFS Volume VM 1.1 GB disk1s4

Please help me.

How should I do now?

Thanks.

Run (only once)

diskutil eraseVolume jhfs+ BC1 disk0s3

diskutil eraseVolume jhfs+ BC2 disk0s4

diskutil eraseVolume jhfs+ BC3 disk0s5

diskutil mergePartitions jhfs+ BCMP disk0s3 disk0s5

diskutil list

If you only see disk0s3, then

diskutil eraseVolume fat32 BOOTCAMP disk0s3

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

I have finished the steps.

"diskutil eraseVolume jhfs+ BC1 disk0s3

diskutil eraseVolume jhfs+ BC2 disk0s4

diskutil eraseVolume jhfs+ BC3 disk0s5

diskutil mergePartitions jhfs+ BCMP disk0s3 disk0s5"

Now the diskutil list looks like follow:

/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_APFS Container disk1 702.0 GB
disk0s2

3: Apple_HFS BC1 298.2 GB
disk0s3

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +702.0 GB disk1

Physical Store disk0s2

1: APFS Volume Macintosh HD 528.4 GB
disk1s1

2: APFS Volume Preboot 22.0 MB disk1s2

3: APFS Volume Recovery 517.8 MB
disk1s3

4: APFS Volume VM 2.1 GB disk1s4

The Boot Camp Assistant shows an error message:

"The startup disk does not have enough space to be partitioned.

You must have at least 40 GB of free space available."

What should I do now???

Please help me.

Thank you.

Hi LT,

I did the steps but still have the same error message in BC Assist: "The startup disk must be formatted as a single Mac OS Extended (Journaled) volume or already partitioned by Boot Camp Assistant for installing Windows."

diskutil list =

/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: Microsoft Basic Data BOOTCAMP 249.5 GB
disk0s3

4: Apple_HFS UntitledHFS 893.4 MB
disk0s4

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +249.7 GB
disk1

Physical Store disk0s2

1: APFS Volume Macintosh HD 230.3 GB
disk1s1

2: APFS Volume Preboot 21.9 MB disk1s2

3: APFS Volume Recovery 517.8 MB
disk1s3

4: APFS Volume VM 1.1 GB disk1s4

What am I missing?

I had the below error:

diskutil mergePartitions jhfs+ BCMP disk0s3 disk0s4

The chosen disk does not support resizing.

Do you wish to format instead? (y/N) y

Merging partitions into a new partition

Start partition: disk0s3 BOOTCAMP

Finish partition: disk0s4 UntitledHFS

Merging partitions encountered error "Operation not permitted (1)".

The erase will not occur.

What does it mean?