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A non-destructive Time Machine local-snapshot workflow covering APFS accounting, inventory, backup health, supported thinning, deletion, and verification.
Creating, listing, mounting, and cleaning up APFS local snapshots directly — the same mechanism Time Machine uses, available for manual, ad-hoc use.
Understanding the container/volume distinction that makes APFS different from older partition schemes, and using diskutil to manage volumes directly.
Released September 25, 2017, High Sierra converted flash-storage Macs to Apple File System automatically — the biggest Mac filesystem shift in decades.
How APFS's container/volume model, copy-on-write clones, and snapshots replaced HFS+ across every Apple platform starting in 2017.