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!