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scheduling

Scheduled activities: 3 launchd or DAS?

While macOS uses DAS-CTS to schedule hundreds of background activities, third-parties normally use launchd. Comes with a full diagram explaining DAS-CTS.

February 2, 2023 Macs, Technology

Scheduled activities: 2 Running the activity

How running a background task takes a tiny fraction of second, although the task itself takes seconds or minutes, and why it’s run on E cores.

January 30, 2023 Macs, Technology

How macOS manages M1 CPU cores

T T Read More

From the 8 cores of the original M1 chip to the M1 Ultra’s 20, this is how macOS manages threads from apps, services and other code.

April 25, 2022 Macs, Technology

macOS has different strategies for M1 cores

There are two situations when M1 chips confine code to just one of their Performance cores: during startup, before the other cores are running, and when preparing an update.

March 17, 2022 Macs, Technology

Background activity scheduling with CTS in Catalina

CTS now schedules many important services, including syncing Calendar, Contacts, Messages, running weekly firmware checks with eficheck, and more.

October 19, 2020 Macs, Technology

What happens when background scheduling fails

CTS scheduling and dispatch of background tasks has no user interface, and no controls. How can you tell that there’s a problem, and what to do about it?

October 17, 2020 Macs, Technology

How macOS schedules and dispatches background tasks using CTS 3

What does it take for an app to have ‘activities’ managed for efficiency by CTS? Not a lot – but in return, the management is a black box.

October 15, 2020 Macs, Technology

How macOS schedules and dispatches background tasks using CTS 2

In the first article in this series, I explained how a great many background activities in macOS, including […]

October 14, 2020 Macs, Technology

How macOS schedules and dispatches background tasks using CTS 1

Rather than using cron or launchd, many background services in macOS are now run using Centralized Task Scheduling (CTS). This is how it works.

October 13, 2020 Macs, Technology

Mints now provides better volume info, and looks at task scheduling

T T Read More

Adds a new log view of background task scheduling and dispatch, greatly improves volume info, and fixes a rare crash.

October 12, 2020 Macs, Technology, Updates
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