Changes to keychains, volume structure, Time Machine, Migration Assistant, and the security command tool that have only recently come to light, six months later.
volume
In APFS, containers, volumes and folders have different properties and features. Choosing the right one, and setting any size options, is an important step in good storage management.
How to resolve an inode number to a path and filename, and how to go the other way from a file to an inode number. How you can tell which files are on System and Data volumes.
Add another volume to your Mac’s internal SSD and try to eject it. All hell breaks loose as the Finder wants to eject the whole disk, it seems. Probably a 6-year old bug.
You’re in a rush to eject an external disk, but the Finder tells you it’s in use by unnamed apps. What should you do next, and what has Sloth to do with it?
What separates System and Data volumes, and how does macOS know they’re part of a boot volume group? What distinguished backup volumes, and what is Sidecar?
How to obtain and read entries in the Unified log made by APFS. Their structure, and a guide to their identification and occurrence.
Keybags, wrapping keys, VEKs and KEKs all explained. Did you realise how Recovery Keys are implemented? Or how the SSV protects against read errors?
From the GPT division of storage space, through APFS containers, down to individual volumes, an account of how APFS works.
After studying thousand of log entries in less than 2 seconds, this is how macOS updates its values for purgeable and available space. But who uses them?
