The case against a live wallpaper has always been the fan noise. Wallspace is a native Swift app built around hardware-accelerated playback, so a 4K loop runs at 60fps under 2% CPU — quiet enough to leave on through a video call. Each display gets its own loop, you can drop in any MP4 file from the disk without re-encoding, and the lock screen gets the same treatment on macOS 26+. Free with a one-time $8.99 Pro tier for the curated 4K catalog and lock-screen support.