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I installed Boot Camp last month on my Mac (Big Sur/macOS 11.7.10) so I could run Windows 10. I created a partition of a modest size, assuming that it would be adequate. I've since realized that that I didn't allocate enough storage space.

I looked at increasing the partition's size with Disk Utility, but it says, "This volume cannot be resized." (See screenshot.) Boot Camp Assistant doesn't offer an option to change it either.

I did find some third-party applications that claim to elegantly allow users to manage Boot Camp's partition size, but they're not sold at a price that I can afford. I couldn't find any free solutions either.

How can I increase Bootcamp's partition size on Big Sur? Are there any trustworthy free or low-cost solutions? Any good or undocumented workarounds?

Screenshot of the Disk Utility app displaying partition information, along with highlighted text indicating that the volume cannot be resized

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  • start over .....
    – Ruskes
    Commented Dec 8, 2023 at 23:56
  • 1
    Does this answer your question: Resize macOS partition gaining from Windows partition resized? If not and your question gets flagged as a duplicate, then post a comment explaining why not.
    – David Anderson
    Commented Dec 9, 2023 at 0:26
  • Hi, @DavidAnderson. That other question is for a similar, but otherwise different issue, and the answer doesn't address my need. The Q&A there discussed modifying or moving the partition(s) for macOS, not BOOTCAMP/Windows. My question is asking about increasing the size of latter.
    – EJ Mak
    Commented Dec 10, 2023 at 21:20
  • EJ: I posted an answer here.
    – David Anderson
    Commented Dec 10, 2023 at 23:58

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