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Question: Boot camp assistant can't partition my drive

I've been trying to install Windows 10 on my Macbook Air (Late 2013). Every time I try, however, I get the popup saying that my disk can't be partitioned and to run Disk Utility. I've tried everything. I've redownloaded Windows, run First Aid multiple times with no problems and even wiped my entire hard drive and reinstalled Mac OS. What's strange is that I CAN partition my disk using Disk Utility with no problem, it's just that BCA can't partition my disk for whatever reason. Any solutions?

MacBook Air

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Feb 28, 2018 4:45 PM in response to Loner T In response to Loner T

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *251.0 GB
disk0

1: EFI EFI 209.7 MB
disk0s1

2: Apple_APFS Container disk1 250.8 GB
disk0s2


/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +250.8 GB
disk1

Physical Store disk0s2

1: APFS Volume Macintosh HD 20.9 GB disk1s1

2: APFS Volume Preboot 43.1 MB disk1s2

3: APFS Volume Recovery 1.0 GB disk1s3

4: APFS Volume VM 1.1 GB disk1s4


/dev/disk2 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_partition_scheme +182.8 MB
disk2

1: Apple_partition_map 32.3 KB disk2s1

2: Apple_HFS Google Chrome 182.8 MB
disk2s2


/dev/disk3 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: CCCOMA_X64FRE_EN-US... +4.7 GB disk3


Feb 28, 2018 4:45 PM

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Mar 1, 2018 2:29 AM in response to Loner T In response to Loner T

I don't have a TM backup.


Repairing the partition map might erase disk0s1, proceed? (y/N) y

Started partition map repair on disk0

Checking prerequisites

Checking the partition list

Adjusting partition map to fit whole disk as required

Checking for an EFI system partition

Checking the EFI system partition's size

Checking the EFI system partition's file system

Checking the EFI system partition's folder content

Checking all HFS data partition loader spaces

Checking booter partitions

Reviewing boot support loaders

Checking Core Storage Physical Volume partitions

The partition map appears to be OK

Finished partition map repair on disk0

Mar 1, 2018 2:29 AM

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Mar 1, 2018 2:54 AM in response to earthangelo In response to earthangelo

earthangelo wrote:


I don't have a TM backup.

Are you able to create one now?


Also, as a test, in Disk Utility, can you try to create a FAT partition of the size you wants Windows to be? This will determine if there are any underlying APFS corruption issues?

Mar 1, 2018 2:54 AM

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Mar 1, 2018 3:50 AM in response to Loner T In response to Loner T

I tried creating a MS-DOS(FAT) partition and the operation failed. Here's the stuff from "Show details"


Running operation 1 of 2: Add “Untitled” by splitting “Macintosh HD”…

Resizing APFS Container designated by APFS Container Reference disk1

Verifying storage system

Using live mode.

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

Checking volume.

Checking the container superblock.

Checking the EFI jumpstart record.

Checking the space manager.

Checking the object map.

Checking the APFS volume superblock.

Checking the object map.

Checking the fsroot tree.

Checking the snapshot metadata tree.

Checking the extent ref tree.

Checking the snapshots.

Checking the APFS volume superblock.

Checking the object map.

Checking the fsroot tree.

Checking the snapshot metadata tree.

Checking the extent ref tree.

Checking the snapshots.

Checking the APFS volume superblock.

Checking the object map.

Checking the fsroot tree.

Checking the snapshot metadata tree.

Checking the extent ref tree.

Checking the snapshots.

Checking the APFS volume superblock.

Checking the object map.

Checking the fsroot tree.

Checking the snapshot metadata tree.

Checking the extent ref tree.

Checking the snapshots.

Verifying allocated space.

warning: Overallocation Detected on Main device: (1891539+39) bitmap address (3969378)

The volume /dev/disk0s2 appears to be OK.

Storage system check exit code is 0.

Shrinking APFS Physical Store disk0s2 from 250,790,436,864 to 125,395,218,432 bytes

Shrinking APFS data structures

APFS Container Resize error code is 49168

A problem occurred while resizing APFS Container structures.

Operation failed…

Mar 1, 2018 3:50 AM

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Question: Boot camp assistant can't partition my drive