With APFS, Time Machine underwent major change, to using snapshots to determine what to back up, rather than FSEvents. How well has this worked?
With its 2 TB Fusion Drive well over half full, upgrading my iMac from Sierra to Mojave could so easily have been a nightmare.
Some Macs start running the Mojave upgrade like it’s molasses or treacle: starting an app takes a minute or more, and other function grind to a halt. Here’s why, and what you should do.
A post-mortem analysis on attempts to make my iMac dual-boot between Sierra and High Sierra. Can it be done in safety?
More trials and tribulations with the High Sierra upgrade. Is it possible to make a dual-boot system? And is it wise?
Explains how Time Machine knows what to back up, why it performs deep event scans, and how that system is different from HFS+ journaling.
When Time Machine seems to take a long time preparing the next backup, or gets stuck, here is how to diagnose and deal with it.