| Aerial | Skywall | |
|---|---|---|
| What it is | A screen saver. A wallpaper extension is in beta, macOS 26 only | A wallpaper that plays while you work |
| Runs on | macOS 15 and later; older Macs need the legacy 3.6.3 build | macOS 14 and later |
| On screen | Optional clock, weather and now-playing overlays, live cameras | The film, with nothing drawn on top |
| Setting it up | Deep preferences: per display, time of day, custom videos | Click a film |
| The footage | The same films in its own cache, plus your own videos | The built-in films, from the folder macOS keeps them in |
What Aerial does well.
Aerial has brought these films to Mac screen savers for over a decade. It puts a clock, the weather and what you are listening to over the footage, pulls in live camera feeds, shifts the reel by time of day, and takes custom videos of your own. Version 4 rebuilt it as an app extension in place of the old screen-saver plug-in.
Where the two part ways.
A screen saver runs when you stop working. Skywall runs while you work: the film plays on the desktop, behind your windows, and the same film becomes the screen saver, so the Mac carries on with it when you step away. One choice covers both.
The second difference is how much there is to operate. Aerial rewards configuration and gives you a lot of it. Skywall asks you to pick a film, and draws nothing on top.
Why Skywall can make sense.
Skywall plays the 4K masters where macOS keeps them and fetches missing ones from the system’s own servers, so nothing is downloaded twice or re-encoded, and removing the app leaves that folder holding only the system’s own files. It runs on macOS 14, a year earlier than Aerial 4 requires.
It also stops on its own when the desktop is covered, the Mac locks or sleeps, or the machine runs hot, and pauses under Low Power Mode. The whole thing is one small universal binary.
That is the whole pitch: the films on your desktop, with nothing to set up. Browse all of them and see whether it is for you.
Questions.
Does Aerial work as a desktop wallpaper?
Version 4.1 adds a wallpaper extension, in beta and only on macOS 26. The mature part of Aerial is the screen saver, and that is where its overlays, live cameras and per-display rules live.
Can I run Aerial and Skywall at the same time?
Yes. Skywall draws on the desktop and never touches the screen saver, so your Aerial selection in System Settings stays exactly as you left it.
Will I have to download the films twice?
Not for Skywall. It plays the files already sitting in the Aerials folder macOS maintains, and fetches a missing one from the same source the system uses. Nothing is copied to a second location.
Which one should I choose?
Take Aerial if you want a configurable screen saver with a clock and weather on it. Take Skywall if you want the films on the desktop while you work, on macOS 14 or later, with nothing to set up.
Next: how to change the wallpaper on a Mac, including the films the system keeps to itself.