Boot Camp Error During Partitioning

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Level 1

65 points

Boot Camp Error During Partitioning

Dear Apple Community,

I have an Intel-based iMac with the latest software updates running Monterey. I followed the Boot Camp instructions step-by-step to install Windows 11, however ran into the below error. I then followed the instructions on how to resolve the error (running First Aid), which failed. Now I am stuck at the step where it recommends to delete the partition (per the link below), but my free partition size is wrong (see screenshot, partition should be around 400 GB free, not almost 1 TB free - I have a 1 TB Fusion Drive). Any advice please? Is it safe to delete the free partition despite it reporting an incorrect size?

If Boot Camp Assistant says that your disk could not be partitioned - Apple Support

iMac Line (2012 and Later)

Posted on Oct 3, 2022 4:18 AM

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Answer 1

-Bubba-

Level 6

10,362 points

Oct 3, 2022 9:38 AM in response to PatrickRayes

First, back up your computer (if you haven't already). This is important- when messing with partitions, anything could happen. The easiest way to resolve this, if you can't do so in Disk Utility, is to backup, erase, and restore.

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Answer 2

PatrickRayes Author

Level 1

65 points

Oct 3, 2022 12:08 PM in response to -Bubba-

Tried and did not work :-/ ... getting this error no matter what revised size I provide for the new partition (900 GB, 1.03 TB, 1 TB etc.). Also see in the screenshot (left) my drive volumes etc. - looks like it's not right (why so many), something wrong, no? Maybe I should post that in the iMac discussion group ... or just cave and do an erase-restore :-/

Fusion Drive 1.03 TB

> Container disk2 1.03 TB, 426.7 GB free

>> Macintosh HD volumes 1.03 TB, 426.7 GB free

>>> Macintosh HD 1.03 TB, 426.7 GB free

>>>> Macintosh HD snapshot 1.03 TB, 426.7 GB free

>>> Macintosh HD - Data 1.03 TB, 426.7 GB free

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Answer 3

PatrickRayes Author

Level 1

65 points

Oct 3, 2022 10:51 AM in response to -Bubba-

OK ... before I do that, I still have the option of deleting the 972 GB partition, as instructed in the Boot Camp guide, however I am hesitating to do that because it reports 972 GB which is almost the size of my 1 TB drive. Thoughts?

I guess if it fails I will do a restore.

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