Part of macOS

`softwareupdated`Software Update

○ Leave it

Checks for and prepares macOS updates.

What it is

Downloads and prepares macOS updates in the background.

Why it might be busy

A macOS update is downloading or being prepared. Usually up to an hour.

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.