The first detailed account of how macOS Sierra runs many of its background activities, complete with a diagram.
DAS
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.
Working out why Time Machine backups go wrong isn’t necessarily that different from unravelling classical mythology. In some ways.
The Eclectic Light Company 