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Unable to delete BootCamp Partition

macfrik

macfrik

Contributor
Original poster
Mar 21, 2009
452
45
Utah
Hello MacRumors,

Hope you all are doing awesome. I have a problem on my Mac. This is the 2015 iMac 5K with 1TB of SSD. I am trying to remove the Windows 10 Partition using the BootCamp Assistant, but it is giving me this error, "The Startup disk cannot be partitioned or restored to a single partition. Back up the disk and use Disk Utility to format it as a single Mac OS Extended (Journaled) volume. Restore your information to the disk, and try using boot camp assistant again".

I tried removing the partition using Disk Utility, but the - sign is greyed out. Then I tried another method by booting up the iMac by using El Capitan USB Disk, and opened up the Disk Utility from the USB. I tried to reformat the whole drive, but still, no luck, the system simply wont allow me to delete that Windows Partition.

Anybody ever experienced this? Any help would be much, much appreciated at this point.

Thank you.

Alv
 
Did you try to boot into recovery mode and try removing it from there?
 
Yeah i tried. I tried both internet recovery mode and booted using the usb, but still no luck. It gave me this operation failed error.
 
macfrik said:
Yeah i tried. I tried both internet recovery mode and booted using the usb, but still no luck. It gave me this operation failed error.
Click to expand...
Open Terminal and run these two commands and give us the output of each command. This will show us the partition layout so we can try and help.

Code: 
diskutil list

diskutil cs list
 
Weaselboy said:
Open Terminal and run these two commands and give us the output of each command. This will show us the partition layout so we can try and help.

Code: 
diskutil list

diskutil cs list
Click to expand...
Thank you so much for that. I will try that tomorrow. I am still out of town and be back tomorrow with the result.

Thanks again
 
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Weaselboy said:
Open Terminal and run these two commands and give us the output of each command. This will show us the partition layout so we can try and help.

Code: 
diskutil list

diskutil cs list
Click to expand...

Hello,
here is the diskutil list respond in Terminal

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 Macintosh HD 928.4 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: EFI NO NAME 104.9 MB disk0s4

5: Microsoft Reserved 16.8 MB disk0s5

6: Apple_HFS UNTITLED 70.6 GB disk0s6

/dev/disk1 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD +928.0 GB disk1

Logical Volume on disk0s2

6EAD62E6-B519-4C8C-B17F-EFA6373F4072

Unencrypted

/dev/disk2 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: FDisk_partition_scheme *124.2 GB disk2

1: Apple_HFS Install OS X El Capitan 124.2 GB disk2s1

/dev/disk3 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *6.0 TB disk3

1: EFI EFI 209.7 MB disk3s1

2: Apple_HFS LaCie 5.8 TB disk3s2

3: Microsoft Basic Data LACIE SHARE 179.8 GB disk3s3

And here is the second command.

CoreStorage logical volume groups (1 found)

|

+-- Logical Volume Group 2E0658EE-2034-48F3-8296-40DDFF854EA8

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

Name: Macintosh HD

Status: Online

Size: 928359489536 B (928.4 GB)

Free Space: 8630272 B (8.6 MB)

|

+-< Physical Volume FB04C8F6-B8FF-4A4C-8F20-F91A56916CC8

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

| Index: 0

| Disk: disk0s2

| Status: Online

| Size: 928359489536 B (928.4 GB)

|

+-> Logical Volume Family 3D08BB28-BE00-4680-BCBA-35C37F1CFDA9

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

Encryption Type: None

|

+-> Logical Volume 6EAD62E6-B519-4C8C-B17F-EFA6373F4072

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

Disk: disk1

Status: Online

Size (Total): 927998537728 B (928.0 GB)

Revertible: Yes (no decryption required)

LV Name: Macintosh HD

Volume Name: Macintosh HD

Content Hint: Apple_HFS
 
Sorry for such a long response post. I copied the whole terminal response. Hoping it could clear up some of the problems I am having. Thanks again people!
 
macfrik said:
Sorry for such a long response post. I copied the whole terminal response. Hoping it could clear up some of the problems I am having. Thanks again people!
Click to expand...
No problem... I'm assuming from your earlier posts you have a good backup and you know how to restore from that backup... and you have no issue blasting this whole drive and starting over yes??

If so... do this. Do a command-option-r boot to Internet recovery. Then in the Utilities menu launch Terminal and input the command below. That will kill the core storage volume that you are currently unable to resize. Make sure and disconnect any external drives when you do this.

Code: 
diskutil cs delete "Macintosh HD"

Now quit Terminal and start Disk Utility and go to the erase tab. You should now be able to select the drive brand name itself at the very top of the left column. Then choose Mac OS Extended (Journaled) in the dropdown and apply that format.

This should get you back to one, large HFS+ volume and now you can go ahead and either reinstall the OS from recovery or restore from your clone/backup.
 
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Weaselboy said:
No problem... I'm assuming from your earlier posts you have a good backup and you know how to restore from that backup... and you have no issue blasting this whole drive and starting over yes??

If so... do this. Do a command-option-r boot to Internet recovery. Then in the Utilities menu launch Terminal and input the command below. That will kill the core storage volume that you are currently unable to resize. Make sure and disconnect any external drives when you do this.

Code: 
diskutil cs delete "Macintosh HD"

Now quit Terminal and start Disk Utility and go to the erase tab. You should now be able to select the drive brand name itself at the very top of the left column. Then choose Mac OS Extended (Journaled) in the dropdown and apply that format.

This should get you back to one, large HFS+ volume and now you can go ahead and either reinstall the OS from recovery or restore from your clone/backup.
Click to expand...
Weaselboy,

Thank you much! I am trying it right now.
[doublepost=1459090805][/doublepost]
Weaselboy said:
No problem... I'm assuming from your earlier posts you have a good backup and you know how to restore from that backup... and you have no issue blasting this whole drive and starting over yes??

If so... do this. Do a command-option-r boot to Internet recovery. Then in the Utilities menu launch Terminal and input the command below. That will kill the core storage volume that you are currently unable to resize. Make sure and disconnect any external drives when you do this.

Code: 
diskutil cs delete "Macintosh HD"

Now quit Terminal and start Disk Utility and go to the erase tab. You should now be able to select the drive brand name itself at the very top of the left column. Then choose Mac OS Extended (Journaled) in the dropdown and apply that format.

This should get you back to one, large HFS+ volume and now you can go ahead and either reinstall the OS from recovery or restore from your clone/backup.
Click to expand...

It worked!!!! Gosh thank you so much Weaselboy. If you were here right now I could just hug you hahaha. Thanks again. You're the weekend savior!
 
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