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Crimson Assassin — an 18-second live wallpaper, ready for your Mac.

1440p • 18 sec • Others

Crimson Assassin is a 1440p live wallpaper for Mac from the Red collection in the MacWall catalog.

It is encoded at 2560x1440 (16:9) and loops every 18 seconds without a visible cut. Themes: cinematic, fantasy. Preview it above, then set it on your MacBook, iMac, or external display with MacWall.

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How to set Crimson Assassin as your Mac wallpaper

  1. Download MacWall for macOS (macOS 15 or later) and open it.
  2. Choose Set on Mac on this page, or search "Crimson Assassin" in the app.
  3. Pick one display or all of them. Crimson Assassin starts playing as your desktop wallpaper.
  4. Optional: with Pro on macOS 26 (Tahoe) or later, also use it on the Lock Screen and as a Screen Saver.

Crimson Assassin FAQ

How do I set Crimson Assassin as my Mac wallpaper?
Install MacWall, then choose Set on Mac on this page or search "Crimson Assassin" in the app. It plays behind your windows as a live desktop wallpaper on any connected display.
Is Crimson Assassin a video or a still wallpaper?
It is a video loop at 2560x1440 that repeats every 18 seconds, played with hardware decoding so it stays smooth without slowing your Mac.
Will the Crimson Assassin live wallpaper drain my MacBook battery?
MacWall pauses playback behind full-screen apps and when the display sleeps, so Crimson Assassin costs very little in everyday use.
Can I use Crimson Assassin on the Mac Lock Screen?
Yes, with MacWall Pro on macOS 26 (Tahoe) or later. Pro is a one-time $12.99 payment that unlocks the full catalog, with no subscription.

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Minimum macOS 15.0 or later