Equinox

Equinox builds the same kind of dynamic wallpaper Apple ships with macOS — the kind that shifts through a sequence of images as the day goes on — but from your own photos instead of Apple's stock desert dunes. Choose a Time-based, Solar, or Appearance (light/dark) wallpaper, feed it your images, and export a native .heic wallpaper macOS handles natively.

Why it makes the list

Apple's dynamic wallpaper format isn't officially exposed to end users at all — Equinox reverse-engineered it and turned it into a proper tool with a real interface, including a built-in solar calculator that maps sunrise, sunset, and sun position for any location and date. It's a free, open-source way to build a fully custom dynamic wallpaper without hand-editing plist metadata.

Standout features

• Three wallpaper types — Time-based, Solar (sun position), and Appearance (light/dark)
• Built-in solar calculator using latitude, longitude, and date
• Native .heic export that macOS's own wallpaper system reads natively
• Live preview of the finished wallpaper before exporting
• Set, save, or share the result directly from the app
• Fully native Swift app, no subscription or account required

Pricing

Completely free and open source.