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bootcamp unable to create partition

Trying to create a windows dual boot setup but every time I run boot camp assistant I just get an "unable to partition the drive message" and to run disk utility, but disk utility reports no errors.

I'm running Mojave 10.14.5 on a late 2012 iMac 27. I downloaded the boot camp assistant update as stated here https://support.apple.com/en-us/HT201468 but that doesn't fix it.

Any help would be greatly appreciated.

iMac Line (2012 and Later)

Posted on Jul 7, 2019 1:15 PM

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10 replies

Jul 7, 2019 2:11 PM in response to Hubcaps27

I've been running through other threads and trying all the suggestions to no avail.

So far I have disabled Time Machine and ejected my Time machine drive, and just tried rebooting to single user mode and run fsck_apfs -s -o -y /dev/rdisk1 which reported no errors and the drive was OK.


I do have a 1TB fusion drive which appears to be the issue from what I'm reading.


Again, any help is gratefully appreciated.

Jul 8, 2019 6:01 PM in response to Loner T

** Checking the container superblock.

** Checking the fusion superblock.

** Checking the EFI jumpstart record.

** Checking the space manager.

** Checking the space manager free queue trees.

** Checking the object map.

** Checking the Fusion data structures.

** Checking volume.

** Checking the APFS volume superblock.

** The volume ********** was formatted by hfs_convert (945.200.129) and last modified by apfs_kext (945.260.7).

** Checking the object map.

** Checking the snapshot metadata tree.

** Checking the snapshot metadata.

** Checking snapshot 1 of 1.

** Checking the extent ref tree.

** Checking the fsroot tree.

** Checking volume.

** Checking the APFS volume superblock.

** The volume Preboot was formatted by hfs_convert (945.200.129) and last modified by apfs_kext (945.260.7).

** Checking the object map.

** Checking the snapshot metadata tree.

** Checking the snapshot metadata.

** Checking the extent ref tree.

** Checking the fsroot tree.

** Checking volume.

** Checking the APFS volume superblock.

** The volume Recovery was formatted by diskmanagementd (945.200.129) and last modified by apfs_kext (945.260.7).

** Checking the object map.

** Checking the snapshot metadata tree.

** Checking the snapshot metadata.

** Checking the extent ref tree.

** Checking the fsroot tree.

** Checking volume.

** Checking the APFS volume superblock.

** The volume VM was formatted by apfs.util (945.200.129) and last modified by apfs_kext (945.260.7).

** Checking the object map.

** Checking the snapshot metadata tree.

** Checking the snapshot metadata.

** Checking the extent ref tree.

** Checking the fsroot tree.

** Verifying allocated space.

** The volume /dev/rdisk2 appears to be OK.

bootcamp unable to create partition

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