What is knowledgeconstructiond?

2024-02-05 17:00

You might spot knowledgeconstructiond in Activity Monitor using a fair amount of CPU or memory. It is a normal macOS system process.

What does it do?

knowledgeconstructiond is part of Apple's on-device intelligence system. It builds a map of your activity: which apps you use at certain times, which contacts you talk to, what places you visit, and how you use your devices through the day.

This data powers Siri Suggestions, Focus mode suggestions, and features that try to guess what you need before you ask. For example, when your Mac suggests an app right when you usually open it, knowledgeconstructiond helped make that happen.

Why is it using CPU?

The process studies your usage patterns and builds its data in the background. It tends to be busiest:

After a macOS upgrade, when it needs to rebuild its data
After long use, when it processes built-up activity data
When Spotlight is reindexing, since the two sometimes work together

Does it send data to Apple?

No. The data is built and stored entirely on your device. This is part of Apple's approach of doing intelligence processing locally rather than in the cloud.

Can you reduce its activity?

You can limit what it studies by turning off Siri Suggestions:

Open System Settings, then Siri and Spotlight.
Turn off the Siri Suggestions toggles.

The process may still run, but it will have less to do.

Should you worry?

No. It is a normal background process. If it is using a lot of CPU, let it finish. It usually settles down within an hour or so. A restart can help if it seems stuck.

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