One wallpaper, or one per display
- Every display: Set Wallpaper applies to all displays, and the same wallpaper plays in step on each.
- One display: open a wallpaper, click the arrow next to Set Wallpaper and pick a display under Display.
- Settings → Displays shows what plays on each display.
Ultrawide and mixed sizes
Fill screen, the default, crops the edges so the wallpaper fills each display; Fit to screen shows the whole wallpaper (Settings → Wallpaper). For 21:9 and 32:9 monitors, Explore in the app has an Ultrawide filter, and the web gallery has ultrawide live wallpapers.
Pausing with several displays
A full-screen app pauses only the display it covers, while the others keep playing. Each display with its own wallpaper adds decoding work; with System Wallpaper playback, displays showing the same wallpaper share one player and stay on the same frame.
Go deeper
More questions
- How much CPU does MacWall use?MacWall decodes video in hardware. With System Wallpaper playback on macOS 26+, the MacWall process uses 0% CPU after you quit; macOS still decodes the video.
- Does MacWall drain your MacBook battery?A playing wallpaper uses some power. MacWall pauses behind full-screen apps and while displays sleep, and Pause on battery holds it whenever you unplug.
- Can I use my own video as a wallpaper on Mac?Not with macOS alone, which takes only images. MacWall Pro adds your own MP4, MOV and M4V videos as private live wallpapers on your Mac.