How can you tell whether your Mac supports Continuity, whether you bought an app from the App Store, and diagnose extension problems?
startup
How to explore what happens during startup, and hone in on problems. The second tutorial, medium level.
A basic tutorial showing how to get useful information from Sierra’s new logs, using LogLogger5.
How to enable or mute your Mac’s startup chime, and other neat tricks of the NVRAM.
The bong has gone, without a bang or even a whimper. Why are the latest Macs mute?
After a near-panic and interminable spin, it proved impossible to get useful diagnostic information. Here are some tools and techniques which should still be useful.
Another commonly-suggested panacea, Safe mode has its uses, if you understand why it is ‘safe’.
How to understand Console’s log entries for a normal shutdown, and a normal startup.
Was that crash a freeze, a panic, or just a spinning beachball? And what do they mean?
All the useful key combinations, arranged by function rather than keys.
The Eclectic Light Company 