Bootcamp partitioning error in macOS 10.13

I had the exact same problem with BootCamp Assistant and solved it with deleting local Time Machine snapshots.

Try my solution if you had turned on Time Machine Back Up Automatically.

1. Turn off "Back Up Automatically" in Time Machine.
2. Type in the command in Terminal to check local snapshots.

   tmutil listlocalsnapshots /

3. Delete snapshot one by one by

   tmutil deletelocalsnapshots <snapshot_date>

   (replace <snapshot_date> with the dates shown in the list, e.g. 2018-01-01-231501).
4. Redo step 2 to check if all the snapshots have been deleted.

Then start over in BootCamp.

Same problem, found a method that worked.

(Running High Sierra 10.13.1 on a MBP 15" 2016.)

-Open Disk Utility, and select your BOOTCAMP volume

-Select 'Erase'; I renamed mine TEST and reformatted as Mac OS Extended (Journaled)

-Select your Macintosh HD partition

-Select 'Partition'; this gave me a pie chart with three volumes: Macintosh HD, the newly created TEST, and disk0s4

-Select TEST partition; on the '+ -' buttons below it, select '-' (minus). This made TEST disappear in the piechart graphic, and added the space to Macintosh HD. Hit 'Apply'.

My MBP appeared to lock up at this point, but after a minute or so, it announced the repartitioning was successful. Disk Utility showed the pie chart correctly, but inaccurately listed the space on my Macintosh HD volume, until I closed and reopened it.

If you have deleted all local snapshots and run Disk Utility First Aid, then the only remaining option is Time Machine backup/erase/restore. This is usually due to APFS corruption.

There are also some known issues with BCA partitioning on APFS containers.

Can you run Disk Utility First Aid and then retry? Did 10.13 convert your disk to APFS containers?

Thanks! That worked for me even if I have never used Time Machine in the past. Just typed this in:

tmutil thinlocalsnapshots / 9999999999999999

Try

sudo tmutil thinlocalsnapshots / 9999999999999999

You will be prompted for your password, which will not be echoed back to you.

Checking the logs helps. I deleted the local TIme Machine snapshots and it worked (the command shown in the previous comments doesn't work).

tmutil listlocalsnapshots /

sudo tmutil deletelocalsnapshots 2017-... (snapshot name here)

In case this happens to anyone else-

I was trying to install Windows 10 on a brand new MacBook Pro and got this error. I had disk encryption on, once there was a key set for this Mac the install could continue. With a new computer the encryption took a few hours to finish.

Saw this answer on another site and it worked for me, it may be here somewhere as well.

Can you run the following command from macOS Terminal and post the output?

diskutil repairDisk disk0

Also, post the output of

diskutil list

The error code 49153 is not good. It indicates issues with APFS. You may need to talk to Apple Technical Support or post the error code in macOS High Sierra forum.

Solved. It was the encryption that stopped it, so I change the setting and it allowed the partition. Not after I spent a few hours trying to work around 'purging'!!!!!

Create a Time Machine backup, erase your whole internal drive, restore it and retry.

Can you manually create a FAT32 partition using Disk Utility?

This is an issue with the APFS on the Mac side. Reach out to Apple Tech Support.