This container can’t be split, because one or more of its volumes it not mounted.

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This container can’t be split, because one or more of its volumes it not mounted.

Hi, I installed Windows 10 on my MacBook Air (13-inch, 2017) because I wanted to download a game. The size is 121.33 GB. Apparently, I don’t have enough disk space so I’m trying to add more GB’s to the bootcamp by the Partition option in the Disk Utility but it won’t let me. “This container can’t be split, because one or more of its volumes is not mounted”. I’m not sure what it means and I’ve googled everywhere for someone with an issue like mine but I have yet to find an answer. Can anyone help me? Thank you so much if you can.

MacBook Air

Posted on Aug 29, 2021 3:44 PM

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Answer 1

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Loner T

Level 9

59,536 points

Aug 29, 2021 4:39 PM in response to Chrissyv_x

Do not use Disk Utility to manipulate partition sizes, once Windows is installed. If you need to change the size, you will need to first Remove Windows from your Mac using Boot Camp - Apple Support and then re-install it. A 120GB disk may be too small for a macOS and W10 installation, once any additional software is installed in W10.

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This container can’t be split, because one or more of its volumes it not mounted.

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