My primary computer is a (mac) laptop. I dock it into a Thunderbolt dock on my desk. That dock has a bunch of additional secondary storage, as well as a wired network that attaches to a NAS.

I want a physical button that I can plug into this setup, which will:

- visually display the mounted status of those drives
- when pressed, cleanly eject the drives

Crucially, this needs to be able to work *while the screen is locked*. I've checked, and e.g. a Stream Deck will not let me do this.