Chapter 23
Troubleshooting macOS
IN THIS CHAPTER
Facing the ol’ “My Mac Won’t Boot” blues
Dealing with the prohibitory sign
Recovering from startup crashes
Using High Sierra’s Optimized Storage
As a bleeding-edge Mac enthusiast and consultant with more than a quarter century of Mac experience, I’ve seen more than my share of Mac troubles. Over those years, I’ve developed an arsenal of mostly surefire tips and tricks that I believe can resolve more than 90 percent of Mac issues without a trip to the repair shop.
Alas, if your hardware is dead, then, sadly, neither you nor I can do anything about it because it is now a job for your friendly Mac repairman — and your fat checkbook or high-limit credit card. But if your hardware is okay, you have a fighting chance of using the suggestions in this chapter to get your machine up and running.
About Startup Disks and Booting
Although you usually see a stylish Apple logo when you turn on your computer, once in a blue moon, you may instead see a solid blue screen, a solid gray screen, a solid black screen, or something else entirely, as described ...
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