Partitioning disk taking too long

I’m trying to install Windows bootcamp again, because I tried to delete it to add more storage, and I’m stuck at the “Partitioning disk...” part. The first time and second time I have downloaded bootcamp it worked like a charm, but my recent tries have been really irritating. Any solutions?

iMac Pro

Posted on Apr 24, 2019 6:08 PM

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Question marked as Top-ranking reply

Posted on Apr 28, 2019 5:49 PM

Uniblizz wrote:

(After 2nd try for Windows Install)
/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk0
   1:                        EFI                         209.7 MB   disk0s1
   2:                 Apple_APFS Container disk1         750.0 GB   disk0s2
   3:         Microsoft Reserved                         16.8 MB    disk0s3
   4:       Microsoft Basic Data                         250.0 GB   disk0s4

If this is your current partition layout, run


diskutil eraseVolume jhfs+ BC1 disk0s3

diskutil eraseVolume jhfs+ BC2 disk0s4

diskutil mergePartitions jhfs+ BCMP disk0s3 disk0s4


If you these commands complete without any errors, then


diskutil eraseVolume fat32 BOOTCAMP disk0s3


and now run BCA and click on Remove/Restore.


Once you have your full disk space in macOS, re-run BCA and try to install Windows. You can skip the Create+Download steps.

167 replies

Apr 24, 2019 6:52 PM in response to Loner T

/dev/disk0 (internal, physical):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                        *1.0 TB     disk0

   1:                        EFI                         209.7 MB   disk0s1

   2:                 Apple_APFS Container disk1         749.0 GB   disk0s2

   3:           Windows Recovery                         505.4 MB   disk0s3



Apr 24, 2019 7:15 PM in response to Loner T

Finished erase on disk0

Started APFS operation

Aligning grow delta to 250,995,130,368 bytes and targeting a new physical store size of 999,995,129,856 bytes

Determined the maximum size for the targeted physical store of this APFS Container to be 999,994,101,760 bytes

Resizing APFS Container designated by APFS Container Reference disk1

The specific APFS Physical Store being resized is disk0s2

Verifying storage system

Using live mode

Performing fsck_apfs -n -x -l -S /dev/disk0s2

Checking the container superblock

Checking the EFI jumpstart record

Checking the space manager

Checking the space manager free queue trees

Checking the object map

Checking volume

Checking the APFS volume superblock

The volume M5 was formatted by hfs_convert (945.230.6) and last modified by apfs_kext (945.230.6)

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 (945.230.6) and last modified by apfs_kext (945.230.6)

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 (945.230.6) and last modified by apfs_kext (945.230.6)

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 (945.230.6) and last modified by apfs_kext (945.230.6)

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

Performing deferred repairs

The volume /dev/disk0s2 appears to be OK

Storage system check exit code is 0

Growing APFS Physical Store disk0s2 from 748,999,999,488 to 999,995,129,856 bytes

Modifying partition map

Growing APFS data structures

Finished APFS operation


Sorry for the inconvenience, but I have to continue this tomorrow because I have school and it is late where I am. But thank you for helping so far ^_^

Apr 24, 2019 7:34 PM in response to Uniblizz

Uniblizz wrote:

Growing APFS Physical Store disk0s2 from 748,999,999,488 to 999,995,129,856 bytes
Modifying partition map
Growing APFS data structures
Finished APFS operation

Looks good.

Sorry for the inconvenience, but I have to continue this tomorrow because I have school and it is late where I am. But thank you for helping so far ^_^

Post back when you are ready.

Apr 26, 2019 8:12 PM in response to Loner T

Started APFS operation

Aligning shrink delta to 249,995,132,928 bytes and targeting a new physical store size of 749,999,996,928 bytes

Determined the minimum size for the targeted physical store of this APFS Container to be 612,001,173,504 bytes

Resizing APFS Container designated by APFS Container Reference disk1

The specific APFS Physical Store being resized is disk0s2

Verifying storage system

Using live mode

Performing fsck_apfs -n -x -l -S /dev/disk0s2

Checking the container superblock

Checking the EFI jumpstart record

Checking the space manager

Checking the space manager free queue trees

Checking the object map

Checking volume

Checking the APFS volume superblock

The volume M5 was formatted by hfs_convert (945.230.6) and last modified by apfs_kext (945.230.6)

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 (945.230.6) and last modified by apfs_kext (945.230.6)

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 (945.230.6) and last modified by apfs_kext (945.230.6)

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 (945.230.6) and last modified by apfs_kext (945.230.6)

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

Performing deferred repairs

The volume /dev/disk0s2 appears to be OK

Storage system check exit code is 0

Shrinking APFS Physical Store disk0s2 from 999,995,129,856 to 749,999,996,928 bytes

Shrinking APFS data structures

Shrinking partition

Modifying partition map

4096 bytes per physical sector

/dev/rdisk0s3: 488150592 sectors in 7627353 FAT32 clusters (32768 bytes/cluster)

bps=512 spc=64 res=32 nft=2 mid=0xf8 spt=32 hds=255 hid=1465253888 drv=0x80 bsec=488269824 bspf=59592 rdcl=2 infs=1 bkbs=6

Mounting disk

1 new disk created or changed due to APFS operation

Disk from APFS operation: disk0s3

Finished APFS operation

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Partitioning disk taking too long

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