The entire resizing strategy will not work otherwise. Note that it is important that this newly created partition is situated immediately adjacent and contiguous to the main Boot Camp partition. When the Apply button is clicked, Disk Utility should shrink the primary APFS container, create the new partition of the demanded size, and format it, all without damaging any data on the original Macintosh HD volume - even if it was FileVault encrypted, as mine was. Any filesystem should be ok, as we will be deleting this partition shortly afterwards anyway. In theory, this additional buffer space isn’t strictly necessary, but I ran into an issue in Step 3, that I had to resolve by absorbing less than the full unformatted space. Choose the Add Partition option.Ĭhoose a size that is slightly (by 1 GB or so) larger than the desired space to be added to Boot Camp Windows. This time the + button should be enabled, and it should ask whether it should create a partition or a volume. Re-open Disk Utility and try the Partition tool bar button again. Wait a couple of minutes after the snapshot deletions - sometimes it seems to take Disk Utility a bit to re-detect available space. Quit the Disk Utility app if it was previously open. This should show a list of deleted snapshots. Removing snapshotsįirst, turn off Time Machine automatic backups. To be able to shrink the container, these snapshots need to be removed first in order to truly free up the space for shrinking. I believe this is because macOS is using the supposed “free” space on the disk to store local Time Machine snapshots, and thus the “free space” in the container is not actually free. This rather obtuse error actually means that the Time Machine snapshots on the primary macOS partition need to be deleted. In trying to add the partition, however, Disk Utility may report that “This container can’t be split, because the resulting containers would be too small.” In this case, the + (plus) or – (minus) buttons to add and remove partitions in Disk Utility will be grayed out. In Disk Utility, select the Apple SSD physical disk, and click the Partition button at the top of the tool bar to open the pie chart, and Click the + button to add a partition. Disk Utility in macOS can do this losslessly, by shrinking the primary APFS container. The first step is to add a new partition, right in front of the Window partition. On a standard Boot Camp setup, there are three major partitions - the first is the APFS container containing all the Mac volumes, the second is the Windows NTFS partition, and the third is the Windows recovery partition. Re-absorb the remaining free space back into the main APFS container.Reboot into Boot Camp and use a Windows partition manager to claim most of the free unformatted space.Delete the partition in macOS and leave unformatted free space in its place.
![mac os delete boot camp mac os delete boot camp](https://cdn.cultofmac.com/wp-content/uploads/2017/03/winclone6-running-on-macbook-pro.jpg)
This partition should exist adjacent to the Windows partition. Add a new partition (note: not a new APFS volume, but a new partition / APFS container) with a slightly larger size than the desired amount of space to be added to Boot Camp, via Disk Utility, which will losslessly shrink the AFPS macOS container to do so.Keep full backups via Winclone and Time Machine in case something goes wrong! General concept Sorry, but again, this is what worked for me, and is no guarantee that it would work for anyone else. I am not responsible for any damage that may result if anyone follows my notes. Changing disk partitions across two operating systems always has the risk of seriously damaging partition maps and rendering data irretrievable. There is no guarantee this works for other models of MacBooks or OS versions. These are notes that I took to ensure that I can replicate the procedure next time.ĭISCLAIMER: this is what worked for me, on my EFI-based MacBook Pro.
![mac os delete boot camp mac os delete boot camp](https://i.ytimg.com/vi/XiRdwfCWQN8/hqdefault.jpg)
It is possible, and actually, quite straightforward to resize the Boot Camp partition on macOS 12.6, even with an encrypted AFPS system volume, with minimal third party tools. There is a lot of conflicting or outdated information about this procedure, including some which assert that it was impossible.
![mac os delete boot camp mac os delete boot camp](https://tc-static.s3.amazonaws.com/images/asset_140/1.png)
In short, I needed to grant about 100 GB of extra space to my Bootcamp Windows partition from my Mac partition, without erasing and reinstalling Windows, on macOS 12.6 Monterey running on a 2019 Intel MacBook Pro.