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A complete walkthrough 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 fundamentally different from older partition schemes, and using diskutil directly to add, resize, and manage volumes without wasting disk space on fixed partitions.
Released September 25, 2017, High Sierra automatically converted flash-storage Macs to Apple File System — the biggest filesystem transition on the Mac in nearly two decades.
How APFS's container/volume model, copy-on-write clones, and snapshots replaced HFS+ across every Apple platform.