Full-screen app
When a window goes full-screen — a film, a game, Keynote — playback stops. You'd never see the wallpaper anyway.
A live 4K wallpaper should feel weightless. Wallper hands every frame to the Mac's dedicated video hardware and draws straight into the desktop layer — so your battery, fans, and apps barely notice it's there.

Every frame is handed to the Mac's built-in video engine through native AVFoundation. The CPU never software-decodes 4K — which is why idle usage stays in the low single digits, even on a fanless MacBook Air. Smooth motion, cool chassis, quiet fans.
A live 4K loop should cost almost nothing. On Apple Silicon, Wallper leaves the overwhelming majority of your CPU free, adds only a few percent of battery drain, and hands every frame to the GPU's dedicated video decoder. Fans stay quiet, the chassis stays cool.

The same decoding core renders into the desktop, the lock screen, a native screensaver, and behind the menu bar — without compositing a panel over your workspace. Your apps, widgets, and icons stay fully interactive; nothing intercepts clicks or steals GPU time.
Wallper stops playing the moment it isn't worth it — four conditions, all configurable.
When a window goes full-screen — a film, a game, Keynote — playback stops. You'd never see the wallpaper anyway.
Unplugged, Wallper freezes on the current frame and shows it as a static image. Re-enable always-on playback in Preferences if you prefer.
If your Mac is already working hard, Wallper steps aside and gives the cores back to your real workload.
When the screen sleeps, decoding stops entirely. No frames are drawn to a display nobody is looking at.
One universal binary, tuned for the whole modern Mac lineup.
Figures are typical results from internal testing on Apple Silicon at 4K HEVC with default settings. Real numbers vary with your chip, resolution, number of displays, and whether sound or always-on playback is enabled — so treat these as honest ballparks, not guarantees.