This bug disrupts Time Machine backups and all the dozens of activities which macOS manages. It may make Sierra unsuitable for use in servers.
Time Machine
When Time Machine seems to take a long time preparing the next backup, or gets stuck, here is how to diagnose and deal with it.
Why was my Mac still preparing a backup 20 minutes after it should have been completed? And what is a ‘deep event scan’?
The first beta of the free log browser is now available. It lets you open multiple windows on your logs.
First full release, with several significant enhancements, and full documentation. Free as always.
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.
macOS Sierra doesn’t run periodic backups using a simple mechanism. Here’s the story in full detail.
Working out why Time Machine backups go wrong isn’t necessarily that different from unravelling classical mythology. In some ways.
Getting deeper into using Sierra’s new logs, and investigating why Time Machine backups become irregular.
The Eclectic Light Company 