So many different types, from read-only disk image .dmg files, to sparse bundles and DVD/CD-R masters. Which to use, and how to create them?
hdiutil
Disk Utility can’t image APFS volumes, and normally returns an error if you try to image a container. Here’s the workaround.
Important update for all users, which addresses several bugs in setting the maximum size of sparse bundles.
How to set the total size, and band size, for your sparse bundles, with calculation of the critical band size.
Saves you from having to learn how to use hdiutil, and supports 6 different file systems and custom band sizes.
What if you don’t want whole disk encryption? If your Mac doesn’t have T2, or if you’re using an external drive, encryption is still performed in software. Here’s a good solution.
What’s the minimum size of a container, or a volume, in APFS? The answer can range from 1.05 MB up to 167.8 MB, it appears.
Want to increase the size of a disk image in APFS? If you’re relying on Disk Utility to do it, you’re out of luck. But here’s how to do this at the command line instead.
Contains details of the last checksum of a disk image, performed using hdiutil verify, which can be compared against that stored in the image. Read-only and compressed images only.
Disk Utility may seem the most mundane of all the utilities, but together with its command shell partners packs a real punch in several important areas.
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