Bootcamp partitioning error in macOS 10.13

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.

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

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

diskutil repairDisk disk0

Also, post the output of

diskutil list

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.

Excellent. Can you post the output of diskutil list?

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'!!!!!

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

tmutil thinlocalsnapshots / 9999999999999999

Switched off fire vault and I also typed tmutil thinlocalsnapshots / 9999999999999999 in the terminal

Still that bootcamp assistant won't let me create that bootcamp partition 😠

Any ideas?

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

Try

sudo tmutil thinlocalsnapshots / 9999999999999999

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

I have tried that too, but it did not help. Looks like they did sometging wrong with High Sierra.

Please start a new discussion to avoid confusion, and post the output of

diskutil list

diskutil apfs list

diskutil cs list

on the new discussion.

Thank this was help