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So I am trying to add more space to Bootcamp by following this tutorial. But the first red flag came when I went into the partition menu: It doesn't show the partition for Bootcamp. Then I saw that the "free space" part and the "Macintosh HD" doesn't add up to 1TB, in fact, it is more, and I 100% know for sure that this iMac model that I bought in 2019 is only 1TB. (shown in image)

I decided to add a new partition and set it at 200GB and run it, but then it gave me this error (can't copy paste so the image below) enter image description here

So I decided to do some googling but didn't see anyone has anything close to this.

I ran diskutil list and got this back:

/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk0
   1:                        EFI ⁨EFI⁩                     209.7 MB   disk0s1
   2:                 Apple_APFS ⁨Container disk2⁩         870.0 GB   disk0s2
   3:       Microsoft Basic Data ⁨BOOTCAMP⁩                130.0 GB   disk0s3

/dev/disk1 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *28.0 GB    disk1
   1:                        EFI ⁨EFI⁩                     314.6 MB   disk1s1
   2:                 Apple_APFS ⁨Container disk2⁩         27.7 GB    disk1s2

/dev/disk2 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +897.7 GB   disk2
                                 Physical Stores disk1s2, disk0s2
   1:                APFS Volume ⁨Macintosh HD - Data⁩     546.7 GB   disk2s1
   2:                APFS Volume ⁨Macintosh HD⁩            14.9 GB    disk2s2
   3:              APFS Snapshot ⁨com.apple.os.update-...⁩ 14.9 GB    disk2s2s1
   4:                APFS Volume ⁨Preboot⁩                 285.5 MB   disk2s3
   5:                APFS Volume ⁨Recovery⁩                652.6 MB   disk2s4
   6:                APFS Volume ⁨VM⁩                      3.2 GB     disk2s5

/dev/disk3 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *250.0 GB   disk3
   1:             Windows_FAT_32 ⁨KIMI'S USB⁩              250.0 GB   disk3s1

What should I do so that I can partition space from my free space that is in the Macintosh HD drive?

One note is that when I was initially installing Bootcamp, I did force quit bootcamp helper and deleted that partition because it was taking too long, and I reran it afterwards, so that might be the root of the problem

Any help would be appreciated! Thanks

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  • Does " I bought in 2019" mean your Mac is a 2019 model? Might be helpful to know which version of macOS. Feb 4 at 23:22

1 Answer 1

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The Disk Utility application can often present incorrect information. This seems to be the case with respect to your question. On the other hand, the diskutil list command outputs a very reliable information.

You can use the diskutil command to create free space after the Apple_APFS partition on the internal SATA HDD. The commands given below are based on the output from diskutil list command given in your question. You can use the command given below to show how much the Apple_APFS partition on the internal SATA HDD could be shrunk.

diskutil apfs resizecontainer disk0s2 limits

Provided the space is available, the command below would shrink the Apple_APFS partition on the internal SATA HDD to 770 GB and create 100 GB of free space between the Apple_APFS partition and the Microsoft Basic Data partition.

diskutil apfs resizecontainer disk0s2 770G

There are third party tools which can move (or resize upward) a Microsoft Basic Data partition which is NTFS formatted. See this answer for a discussion regarding the pros and cons of these tools and the recommendation of first using chkdsk.

Apple often uses proprietary SSDs which require special drivers. In your case you have a Fusion Container which uses an internal SSD and internal HDD. Windows also resides on this HDD. Here, I assume the HDD uses a standard SATA interface and therefore can be successfully modified by the third party tools discussed in this answer.

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