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 27, 2019 3:13 PM in response to Loner T

After I ran the command you gave me, I check the Disk Utility - Partition Option - and then it says "Free Space", so I'm pretty sure the command worked, but I'll still give you the output of diskutil list:


(When I ran the command to make Free Space)

/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

/dev/disk1 (synthesized):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      APFS Container Scheme -                      +750.0 GB   disk1

                                 Physical Store disk0s2

   1:                APFS Volume M5                      566.7 GB   disk1s1

   2:                APFS Volume Preboot                 42.0 MB    disk1s2

   3:                APFS Volume Recovery                517.0 MB   disk1s3

   4:                APFS Volume VM                      4.3 GB     disk1s4

/dev/disk2 (external, physical):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:     FDisk_partition_scheme                        *15.5 GB    disk2

   1:                 DOS_FAT_32 WININSTALL              15.5 GB    disk2s1



(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

/dev/disk1 (synthesized):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      APFS Container Scheme -                      +750.0 GB   disk1

                                 Physical Store disk0s2

   1:                APFS Volume M5                      565.0 GB   disk1s1

   2:                APFS Volume Preboot                 42.0 MB    disk1s2

   3:                APFS Volume Recovery                517.0 MB   disk1s3

   4:                APFS Volume VM                      4.3 GB     disk1s4

/dev/disk2 (external, physical):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:     FDisk_partition_scheme                        *15.5 GB    disk2

   1:                 DOS_FAT_32 WININSTALL              15.5 GB    disk2s1



Apr 29, 2019 6:52 PM in response to Loner T

I'm not really sure what it is, but when I go onto "System Report/System Information" and click on USB, it tells me (USB 3.0):

But, here is a physical picture of my USB used for the download of the windows files, named "WININSTALL" on my Mac, and looks like this (and I don't really know what type it is):

Also, here are the partitions through the command, diskutil list:



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Partitioning disk taking too long

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