DAS and CTS are largely responsible for work by E cores. DAS typically submits more than 700 activities for scheduling, including those for Time Machine backups, which have changed in Sonoma and later, with implications for LaunchAgents and LaunchDaemons settings.
LaunchAgents
Have your Time Machine backups become irregular, or stopped altogether? Are software updates infrequent, or malware scans rare? Find the answers here.
Apps often have to use separate services to perform privileged tasks for them, or run time-consuming activities in the background. XPC is how the client communicates with those services.
How to control Login and Background items in System Settings, how to identify those you might not recognise, and how to use sfltool for advanced diagnostics and reset.
New to Tahoe is a folder containing three property lists for Launch Angels. What are they, how do the work, and where does RunningBoard come in?
There’s normally more than 500 background activities, like Time Machine backups and XProtect Remediator scans, waiting for dispatch in the list maintained by DAS. How this works.
What can you do when your Time Machine backups stop running regularly? Or another background activity has gone missing?
Login and Background Items are increasingly common, and can cause all sorts of problems. Diagnosing and fixing them is better in Ventura.
Current apps may need to install helper files in the main Library folder for Background Items. Ventura’s new scheme keeps everything in the app bundle.
Login Items can cause many unwanted notifications when you log in. Here’s how to gain control over them, including use of an undocumented command tool.
The Eclectic Light Company 