Two major tools are available to help you deal with problems. Here’s how to use them to best effect.
backup
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.
Getting deeper into using Sierra’s new logs, and investigating why Time Machine backups become irregular.
Browsing existing log entries in macOS Sierra is now much easier and more powerful.
Does macOS scheduling fail when it has been running for more than 10 days? Irregular backups suggest that it does.
Some users are having problems getting Time Machine to work in Sierra. Here are some suggestions to get that first backup completed.
When you keep documents in iCloud, are they backed up in Time Machine, searched in Spotlight, and kept securely?
When it rains, it always pours catfish. And most of the falling fish came courtesy of the App Store.
Should Time Machine back up on demand, or every hour? Sierra doesn’t seem sure. And how Apple needs to think of users more in the App Store.
The Eclectic Light Company 