3

Normally in the Disk Utility you need to select a device. Is it possible to create an AFPS volume as an ordinary file in other filesystem? And if so, how would that be done?

6

You can use the Disk Utility application or a combination of the hdiutil and diskutil commands. The files can be either full images (.dmg) or sparse images (.sparseimage). You can also create a sparse bundle which is actually a folder (.sparsebundle) containing files. The sparse bundle can be used, for example, to create a 10 GB APFS drive on a physical partition that is FAT32 formatted. This would allow a person save a file greater than 4 GB on a drive/partition that was physically FAT32 formatted.

Below is an example of where the Disk Utility is used to create a 1 TB FAT32 formatted sparse image.

  1. Open the Disk Utility application.
  2. From the menu bar select File->New Image->Blank Image....
  3. Enter the following information, then click on Save.

An example of creating a 10 GB APFS sparse bundle is given below.

Note: This sparse bundle folder is created in the FAT32 sparse image from the previous example.

  1. Open the Disk Utility application.
  2. From the menu bar select File->New Image->Blank Image....
  3. Enter the following information, then click on Save.
  4. If the Disk Utility hangs after the pop up shown below appears, then Force Quit the Disk Utility.
6

If you have a file that contains a raw image of a disk, you can use the following command in the Terminal:

hdiutil attach -imagekey diskimage-class=CRawDiskImage myimage.raw

If you haven't got an existing image, you can create a new, empty file named myimage.raw and then attach it without mounting:

hdiutil attach -imagekey diskimage-class=CRawDiskImage -nomount myimage.raw

Then you can create APFS volumes on there as you would have a physical disk and mount them. This can be done via the command line with a command such as:

diskutil apfs create disk5 MyNewVolumeName

where disk5 needs to be replaced with the device name, you've received from the attach command earlier.

  • When creating a new, empty image, the third command above results in: Started APFS operation on disk6 Creating a new empty APFS Container Unmounting Volumes Switching disk6 to APFS Creating APFS Container newfs_apfs: wipefs: Invalid argument Error: -69626: Unable to create a new APFS Container – Richard Wеrеzaк Nov 17 at 22:40

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