This macOS Screensaver plots the position of satellites, by computing their position given orbital parameters. A mirror to access these is provided, but you may change it to use another source.

cropped view of the screensaver. see full screen view

• TL;DR: Uses a combination of Rust, Swift, and Objective-C to display satellite locations. Prediction logic written in Rust, Swift/Objc used for macOS Screensaver portion.
• also, see my blog post

• World Map GeoJSON from nvkelso/natural-earth-vector
• TLEs mirrored to celestrak.richinfante.com from celestrak.com.