Can't remove Bootcamp Partition on MacOS Mojave

Question

I was installing windows 10 using bootcamp and left it running for a while since it would take around 20 minutes. Then I came back to a prompt asking for my Touch ID. Once I did it, bootcamp went into "Roll Back Partitions" and went on for hours (trying to remove the partition). I left it like that overnight and woke up in the morning with the process still running. Then I closed Bootcamp and opened it again. This time it says: "The startup disk cannot be partitioned or restored to a single partition.""The startup disk must be formatted as a single Mac OS Extended (Journaled) volume or already partitioned by Boot Camp Assistant for installing Windows."Now I have unnecessarily lost almost 50GB of space on my already small 256GB Drive. I want to restore everything back to before I ran Bootcamp.I am using the 2017 15" MacBook Pro running MacOS Mojave.

Loner T · Answer

Run diskutil eraseVolume fat32 BOOTCAMP disk0s3and run BC Assistant and click on Remove/Restore.

Loner T · Answer

From Terminal, post the output of diskutil list

Loner T · Answer

Run diskutil eraseVolume jhfs+ BC1 disk0s3diskutil eraseVolume jhfs+ BC2 disk0s4diskutier mergePartitions jhfs+ BCMP disk0s3 disk0s4diskutil listand post the output, before we go further.

Loner T · Answer

Run diskutil mergePartitions jhfs+ BCMP disk0s3 disk0s4

Loner T · Answer

Disconnect all external storage, run a SMC and NVRAM reset. Connect a USB2 Flash drive, only if BC Assistant asks for it.

Amogh2004 · Answer

Merging partitions into a new partition     Start partition: disk0s3 BC1     Finish partition: disk0s4 BC2Started partitioning on disk0Merging partitionsWaiting for partitions to activateGrowing diskFinished partitioning on disk0/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         194.0 GB disk0s2   3:                  Apple_HFS BC1                     56.6 GB    disk0s3

Amogh2004 · Answer

Omg it worked! Thank you so much LonerT, you&#x27;re the best!

Amogh2004 · Answer

Just as an extra, is there anything I have to do to avoid making the same mistake if I download windows again?

Amogh2004 · Answer

How do i run a SMC and NVRAM reset? (I didn&#x27;t connect any external storage the first time)

Loner T · Answer

See How to reset the System Management Controller (SMC) on your Mac - Apple SupportReset NVRAM or PRAM on your Mac - Apple Support

Amogh2004 · Answer

/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         194.0 GB disk0s2   3:       Microsoft Basic Data OSXRESERVED             8.0 GB     disk0s3   4:       Microsoft Basic Data BOOTCAMP                48.7 GB    disk0s4/dev/disk1 (synthesized):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:      APFS Container Scheme -                      +194.0 GB disk1                                 Physical Store disk0s2   1:                APFS Volume Macintosh HD            82.2 GB    disk1s1   2:                APFS Volume Preboot                 43.8 MB    disk1s2   3:                APFS Volume Recovery                512.4 MB disk1s3   4:                APFS Volume VM                      1.1 GB     disk1s4/dev/disk2 (disk image):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:                            CCCOMA_X64FRE_EN-US... +4.7 GB     disk2/dev/disk3 (disk image):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:                            Boot Camp              +1.2 GB     disk3

Amogh2004 · Answer

Amoghs-MacBook-Pro:~ amoghshetty$ diskutil eraseVolume jhfs+ BC1 disk0s3Started erase on disk0s3 BC1Unmounting diskErasingInitialized /dev/rdisk0s3 as a 7 GB case-insensitive HFS Plus volume with a 8192k journalMounting diskFinished erase on disk0s3 BC1Amoghs-MacBook-Pro:~ amoghshetty$Amoghs-MacBook-Pro:~ amoghshetty$ diskutil eraseVolume jhfs+ BC2 disk0s4Started erase on disk0s4 BC2Unmounting diskErasingInitialized /dev/rdisk0s4 as a 45 GB case-insensitive HFS Plus volume with a 8192k journalMounting diskFinished erase on disk0s4 BC2Amoghs-MacBook-Pro:~ amoghshetty$Amoghs-MacBook-Pro:~ amoghshetty$ diskutier mergePartitions jhfs+ BCMP disk0s3 disk0s4-bash: diskutier: command not foundAmoghs-MacBook-Pro:~ amoghshetty$Amoghs-MacBook-Pro:~ amoghshetty$ 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         194.0 GB disk0s2   3:                  Apple_HFS BC1                     7.9 GB     disk0s3   4:                  Apple_HFS BC2                     48.6 GB    disk0s4/dev/disk1 (synthesized):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:      APFS Container Scheme -                      +194.0 GB disk1                                 Physical Store disk0s2   1:                APFS Volume Macintosh HD            82.5 GB    disk1s1   2:                APFS Volume Preboot                 43.8 MB    disk1s2   3:                APFS Volume Recovery                512.4 MB disk1s3   4:                APFS Volume VM                      1.1 GB     disk1s4/dev/disk2 (disk image):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:                            CCCOMA_X64FRE_EN-US... +4.7 GB     disk2/dev/disk3 (disk image):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:                            Boot Camp              +1.2 GB     disk3

Can't remove Bootcamp Partition on MacOS Mojave

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