Why was my Mac still preparing a backup 20 minutes after it should have been completed? And what is a ‘deep event scan’?
diagnosis
Two major tools are available to help you deal with problems. Here’s how to use them to best effect.
Is Time Machine becoming erratic? A simple diagnostic process can establish what the problem is, and how to deal with it.
Browsing existing log entries in macOS Sierra is now much easier and more powerful.
How can you tell whether your Mac supports Continuity, whether you bought an app from the App Store, and diagnose extension problems?
How can you look for error messages preceding an app crashing, or when your Mac panicked and automatically restarted?
So how do you check your logs to see if backups have been made correctly? Forget Console – you’ve got to use Terminal.
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.
Even a performing basic check can be an act of supreme intellectual challenge, or is now flatly impossible. Early beta quality.
Something odd has happened to your Mac. Last time you used it, it worked fine, but doesn’t any more.
The Eclectic Light Company 