It’s a simple and popular request: how is my Mac’s SSD ageing? How long is it likely to last? But macOS has no tool to offer, and 3rd party tools aren’t really ideal for M1 Macs still.
IORegistry
Trying to get hardware info within an app – simple data like CPU details, logic board ID, type of internal storage – is fraught and undocumented, the victim of prolonged self-neglect.
Adds details of the sequence of screens displayed at each stage, to help diagnose boot problems.
Single-diagram summary of how a modern Mac starts up in macOS 10.12 or 10.13, from pressing the Power button to running the kernel.
How macOS gets to load a hefty kernel and over 300 extensions so quickly: it cheats with a pre-linked kernelcache. And why you don’t see extensions loading in the log.
The Eclectic Light Company 