On: Show HN: I reverse engineered macOS to allow custom Lock Screen wallpapers

[jasonpeacock]

What you're asking for is called "kiosk" mode.

Here's a random app I found: https://www.mackiosk.com/

[c22 → jasonpeacock]

I don't think this is quite the same thing as a kiosk setup, though depending on your specific goals you may find a kiosk-based solution to be an acceptable alternative.