Boot camp stuck on Partitioning disk...

Here's the output (there's something about overallocation...):

** 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 Mac HD was formatted by diskmanagementd (945.260.7) 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 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.

warning: Overallocation Detected on Main device: (1382189+1) bitmap address (2d2a6)

warning: Overallocation Detected on Main device: (1653261+1) bitmap address (2d2ae)

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

And yes, OSXRESERVED looks fine from what I can tell:

here's the output:

Last login: Tue May 21 21:18:59 on console

arnes-iMac:~ brushie$ 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_APFS Container disk2         925.3 GB   disk0s2

   3:       Microsoft Basic Data OSXRESERVED             10.0 GB    disk0s3

   4:       Microsoft Basic Data BOOTCAMP                64.7 GB    disk0s4

/dev/disk1 (internal):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                         24.0 GB    disk1

   1:                        EFI EFI                     314.6 MB   disk1s1

   2:                 Apple_APFS Container disk2         23.7 GB    disk1s2

/dev/disk2 (synthesized):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      APFS Container Scheme -                      +949.0 GB   disk2

                                 Physical Stores disk1s2, disk0s2

   1:                APFS Volume Mac HD                  18.4 GB    disk2s1

   2:                APFS Volume Preboot                 45.0 MB    disk2s2

   3:                APFS Volume Recovery                509.7 MB   disk2s3

   4:                APFS Volume VM                      2.1 GB     disk2s4

Sure, problem is solved and win10 installed. Guess I just have to clean up the partitions I won't need.

thanks for your help!

/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 disk2         800.9 GB   disk0s2

   3:                 Apple_APFS Container disk3         27.0 GB    disk0s3

   4:       Microsoft Basic Data OSXRESERVED             10.0 GB    disk0s4

   5:       Microsoft Basic Data BOOTCAMP                162.1 GB   disk0s5

/dev/disk1 (internal):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                         24.0 GB    disk1

   1:                        EFI EFI                     314.6 MB   disk1s1

   2:                 Apple_APFS Container disk2         23.7 GB    disk1s2

/dev/disk2 (synthesized):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      APFS Container Scheme -                      +824.6 GB   disk2

                                 Physical Stores disk1s2, disk0s2

   1:                APFS Volume Mac HD                  17.8 GB    disk2s1

   2:                APFS Volume Preboot                 45.0 MB    disk2s2

   3:                APFS Volume Recovery                509.7 MB   disk2s3

   4:                APFS Volume VM                      2.1 GB     disk2s4

/dev/disk3 (synthesized):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      APFS Container Scheme -                      +27.0 GB    disk3

                                 Physical Store disk0s3

   1:                APFS Volume Untitled                978.9 KB   disk3s1

No, there's no files from what I can see.

thank you!

Okay :)

So I’ll remove them in disk utility. And then? any additional clean up activities I should do?

In another forum post I saw that you proposed running fsck -fy/ in Single-User Mode to fix overallocation - can that be something for me to test too?

Done. Each step worked fine and BC successfully removed the partition but when trying to install win10 again it gets stuck in "partitioning...." again.

Yes.

I've managed to solve it by creating an additional APFS partition in disk utility and then run BCA and create another boot camp partition on that partition.