Part of macOS

`cfprefsd`Settings store

○ Leave it

Reads and saves app and system settings.

What it is

Every app’s preferences pass through here.

If you stop it

macOS starts it again straight away. Leave it.

○ Leave it. Part of macOS, or something that starts again by itself. You never need to close these.

From Procession’s guide, in the words the app shows.