When part of the mechanism which schedules and dispatches Time Machine backups fails, those backups become irregular. Here it is shown in a clear diagram.
DAS
Diagrams how a routine Time Machine backup is scheduled and dispatched using CTS and DAS.
The old bug in macOS Sierra, which has been present since its first release last year, resulting in […]
The first detailed account of how macOS Sierra runs many of its background activities, complete with a diagram.
Improvements to help you see the wood from the trees in your logs.
Has Time Machine started to make irregular backups? Are apps stalling at odd times? This could be just the tool to find out why.
The aim is to be able to run commands at regular intervals using GCD rather than launchd. Here are details of the code and resulting log entries, casting light on how GCD works.
Despite its documentation vanishing, it’s clear that GCD does a lot more than provide an easy way to concurrency for app developers.
Irregular Time Machine backups are one of Sierra’s great mysteries. It now looks as if they might have been fixed in 10.12.4.
macOS Sierra doesn’t run periodic backups using a simple mechanism. Here’s the story in full detail.
The Eclectic Light Company 