Boot Camp Partition unremovable

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Level 1

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Boot Camp Partition unremovable

So I set aside 100 GB for a win10 bootcamp install. iMac rebooted and during install had an error. I now am to the point where the partition does not show up to allow Boot Camp assistant to remove it, nor can I click the minus - symbol in disk utility to add it back to my 1TB fusion drive. Called apple and they had me format the drive but all that did was wipe my information off the 900 GB partition. I still cannot remove the 100 that I set aside for windows.

Any help would be greatly appreciated as the next step would be to have to bring my machine in to Apple.

2017 iMac latest update of high Sierra.

Thanks!

Posted on Feb 18, 2018 3:23 PM

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Answer 1

Best reply

Loner T

Level 9

59,471 points

Feb 18, 2018 7:52 PM in response to iMac'd

If you used/attached any external storage during Windows installation, it would explain the current partitions on your 1TB HDD part.

After we cleanup, I recommend disconnecting all external storage/hubs and a SMC/NVRAM Reset before you next attempt at installing Windows.

Run

diskutil eraseVolume jhfs+ BC1 disk0s4

diskutil eraseVolume jhfs+ BC2 disk0s5

diskutil eraseVolume jhfs+ BC3 disk0s6

diskutil eraseVolume jhfs+ BC4 disk0s7

diskutil eraseVolume jhfs+ BC5 disk0s8

diskutil mergePartitions jhfs+ BCMP disk0s4 disk0s8

diskutil list

If you only see disk0s4, then run

diskutil eraseVolume fat32 BOOTCAMP disk0s4

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

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Answer 2

iMac'd Author

Level 1

4 points

Feb 18, 2018 4:19 PM in response to Loner T

Loner thanks i was hoping you would be able to help.

-bash-3.2# 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_CoreStorage 2 890.4 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Apple_HFS BC1 8.4 GB disk0s4

5: EFI 104.9 MB disk0s5

6: Apple_HFS 405.8 MB disk0s6

7: EFI 104.9 MB disk0s7

8: Microsoft Basic Data BOOTCAMP 99.6 GB disk0s8

/dev/disk1 (internal):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme 28.0 GB disk1

1: EFI EFI 314.6 MB disk1s1

2: Apple_CoreStorage 2 27.6 GB disk1s2

3: Apple_Boot 134.2 MB disk1s3

/dev/disk2 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD +917.0 GB disk2

Logical Volume on disk0s2, disk1s2

F1FC33AA-1B99-4EBD-BBA8-C4A5A61361A1

Unencrypted Fusion Drive

/dev/disk3 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: FDisk_partition_scheme *60.7 GB disk3

1: Apple_HFS Install macOS High S... 60.7 GB disk3s1

/dev/disk4 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme +2.1 GB disk4

1: Apple_HFS OS X Base System 2.0 GB disk4s1

/dev/disk5 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.0 TB disk5

1: EFI EFI 209.7 MB disk5s1

2: Apple_HFS WD Backup 999.8 GB disk5s2

/dev/disk6 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +5.2 MB disk6

/dev/disk7 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk7

/dev/disk8 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk8

/dev/disk9 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk9

/dev/disk10 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +2.1 MB disk10

/dev/disk11 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk11

/dev/disk12 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk12

/dev/disk13 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +12.6 MB disk13

/dev/disk14 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +2.1 MB disk14

/dev/disk15 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +1.0 MB disk15

/dev/disk16 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +2.1 MB disk16

/dev/disk17 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk17

/dev/disk18 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk18

/dev/disk19 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +1.0 MB disk19

/dev/disk20 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +6.3 MB disk20

/dev/disk21 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +6.3 MB disk21

/dev/disk22 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk22

/dev/disk23 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +2.1 MB disk23

-bash-3.2#

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Answer 3

Loner T

Level 9

59,471 points

Feb 19, 2018 3:39 AM in response to iMac'd

iMac'd wrote:

Thank you so much sir.. You saved me a 1.5 hr trip one way to the Apple Store. I really appreciate your time, and knowledge on these boards.

Excellent. Please back up macOS for safety.

iMac'd wrote:

Got a PayPal address? Id gladly love to contribute 🙂

Thanks for the offer. Donate to your favorite charity. 😉

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Answer 4

Loner T

Level 9

59,471 points

Feb 18, 2018 3:42 PM in response to iMac'd

Post the output of the following command from macOS Terminal.

diskutil list

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Answer 5

iMac'd Author

Level 1

4 points

Feb 18, 2018 7:55 PM in response to Loner T

Thank you so much sir.. You saved me a 1.5 hr trip one way to the Apple Store. I really appreciate your time, and knowledge on these boards. Got a PayPal address? Id gladly love to contribute 🙂

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Answer 6

iMac'd Author

Level 1

4 points

Feb 20, 2018 6:14 AM in response to Loner T

Done! Thank you again

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Boot Camp Partition unremovable

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