Moonshine Server is starting on this Mac.
The first time, macOS asks whether TouchDesigner may find devices on your local network. Allow it, or projectors and other devices cannot be reached.
Then open http://localhost:9980 on this Mac, or this Mac's address with :9980 from any device on the network, and create the administrator.
Moonshine starts whenever someone logs in to this Mac, and again if it crashes. To remove it, open /Users/Shared/Moonshine and double-click Uninstall Moonshine.command. Your data stays.