macOS 11 Big Sur has thrown a cryptographically signed monkey wrench into the inner workings of backup apps that make bootable duplicates. There are now workarounds, and Apple promises to fix the necessary underlying tool, but Adam Engst suggests that we need to rethink the role bootable duplicates play in a modern backup strategy.

Regular Mac users don’t need to mess around with APFS snapshots, but if you’re a power user, Rich Trouton’s instructions for creating, managing, and using APFS snapshots could be invaluable.

macOS High Sierra switched to APFS (Apple File System) for Macs with solid-state storage, but what does it do? Jeff Carlson explains why Apple made the change, how APFS works, and what it can do for you.