A few years ago, after Mac OS X’s 20th anniversary, I got it in my head to read all of John Siracusa’s long form reviews for Ars Technica. I forget how I got the impulse. But it’s a pattern that I like to back up and study the basics, see what I didn’t understand before, and improve my foundations.
Recently I published some technical highlight links from that study path as a gist: macOS Internals