Bootcamp partitioning error in macOS 10.13

Hi.

I Got apple support to help me and it worked. It is a LOCAL Time Machine "snapshot" issue. Even if TM is off and you disconnect the external drive...High Sierra saves "snapshots" to the local drive.

Here is the solution:

we’ll going to turn off Time Machine briefly and then after we finish Bootcamp setup we can turn the automatic backups back on. Though of course first question, do you have Time Machine setup?

colin benson

time machine is an external volume and is not connected.

Tiffany

Correct, but if you have it on at all, we need to delete the local Time Machine snapshots that may be saved which allows Boot Camp to partition the disk. These are the described more here. About Time Machine local snapshots

colin benson

time machine is neither connected nor on. i looked at what u sent me. how do i do that?

Tiffany

OK! Before moving further have you ever had it on, if so we will still have those snap shots. So we can go to Terminal, which is in the Utilities folder of your Applications folder then we’ll do the command to delete those.

Tiffany

Ahh I do see you had backups in the past so we definitely want to do this step.

colin benson

yes..last backup was yesterday evening.

colin benson

ok...i'm in terminal

Tiffany

Copy and paste the following command into Terminal, hitting enter after like usual:

tmutil thinlocalsnapshots / 9999999999999999

colin benson

done

Tiffany

Awesome! Now we should be good to go on that end so let’s go ahead and try to run Boot Camp again.

IT WORKS!

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.

I have exactly the same issue on my MBA 128 SSD model. Gets this far then same message. I have 48gb free and am trying to allow 34gn for Windows 10. Have downloaded the anniversary rather than creator as directed by Microsoft. But can’t get last partition stage. Help!!

also running lastest Mac OS

Your restore addresses multiple issues - file system corruption and the local snapshot occupying unnecessary disk space.

This indicates that the Apple BC Engineering and High Sierra Engineering do not regression test enough scenarios before launching products. Craig Federighi's organization needs to do better. The lack of automated switching between the OSes in HS is a big miss as well.

Hi,

I'm having the same problem, can you help me out please? I don't understand computer codes a lot, though. i'm running macOS 10.13.1 . I tried using the command tmutil thinlocalsnapshots / 9999999999999999 mentioned in one of the replies and then tried running bootcamp but got the same error again.

Thanks in advance! 🙂

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.

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.

Hello,

I have exactly same issue in High Sierra 10.13.2

I've already tryed all mentioned here as well as in other threads but problem still persist.

Is there any other way how to fix it unless reformatting/restoring whole system from scratch (which is something I don't want to do).

Disk Utility and cmd version are saying that on disk there is everything OK, TM is disabled and local snapshots thinned. I do have 1TB SSD, MacbookPro 13 with 16gb. Plenty of space.

Thanks for advice.

P.

Thank you! This worked for me. I really didn’t want to have to do a full erase and install.

This is a pretty disappointing bug tbh. Apple just doesn’t care as much about their desktop OS as they used to, and it shows.

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.