How to set a live wallpaper on macOS
macOS doesn't include a true live wallpaper feature. Its "dynamic" wallpapers only cross-fade between still images by time of day, and the aerial screensavers aren't wallpapers. To get a genuinely moving, animated desktop on your Mac, you use a third-party app. Here are the two reliable ways to do it.
Method 1: Generate one with Formosus (easiest)
- Download Formosus (free to install) and drag it to your Applications folder.
- Describe your wallpaper — type a prompt like "a calm forest lake at dawn." The app refines it into a cinematic, motion-friendly scene.
- Generate — Formosus creates a seamlessly looping video (first and last frames match, so the loop is invisible).
- Apply — click once to set it as your desktop. Done.
No video editing, no hunting for files — you describe it, you get it.
Method 2: Use your own video file
If you already have a looping video you want to use, a free app like ScreenPlay can play a local video file as your wallpaper. For the best result, make sure the clip loops seamlessly (the first and last frames should match) so there's no visible jump.
What about Apple's built-in options?
macOS does include a few motion-adjacent features worth knowing: dynamic desktops (time-of-day stills), and on recent versions you can use Apple's aerial screensavers that can carry over to the desktop. These are pleasant but limited — you can't use your own content, and they're not true custom live wallpapers. For that, you'll want one of the apps above.
Tips for the best result
- Seamless loops only — a clean loop is the difference between premium and gimmicky.
- Match your display — use a resolution that fits your screen to keep it crisp.
- Mind battery — animated wallpapers use a little more power than static ones (details here).