Turn your bottom screen into an ambient cinema glow.
Watching movies on a big monitor in the dark? Don't let your MacBook or bottom display sit black, glaring, or distracting. Transform it into a real-time reactive Ambilight that extends your film into the room.
The Multi-Monitor Movie Dilemma
Why watching movies in the dark feels broken on stacked displays.
If you have a big monitor mounted above your MacBook or secondary display, you know the frustration when the room lights go out.
The Distracting Void
Your bottom display sits idle with glaring bright desktop icons, open apps, or a stark pitch-black slab that pulls your eyes away from the action.
- ✕ Eye strain & glare: Stray desktop windows pierce through your dark home theater room.
- ✕ Dead black hole: Turning brightness to zero creates an unnatural black void directly below your movie.
- ✕ Overpriced hardware: HDMI sync boxes cost $250+, introduce HDCP handshake bugs, and don't illuminate your bottom screen.
Immersive Stage Lighting
Your bottom display transforms into an ultra-smooth, high-lumen ambient lighting stage that bleeds colors from your movie into the room.
- ✓ Edge-to-Edge immersion: Explosions, neon cities, and sunsets on top spill naturally onto your desk.
- ✓ 100% Free for Mac: No $250 HDMI sync boxes, no subscriptions, and zero ads.
- ✓ Smart letterbox detection: Automatically ignores black bars so cinematic 2.39:1 widescreen films sync perfectly.
Engineered for Perfection
High-performance Mac engineering under the hood.
Movie Lights isn't an Electron wrapper or slow screen scraper. It is built in native Swift and Metal using Apple's modern ScreenCaptureKit framework.
Ultra-Low Overhead ScreenCaptureKit
Captures bottom video edges with hardware-accelerated zero-copy buffers. Runs at a silky 60 FPS while consuming under 2% CPU, leaving all M-series neural engines and GPU power free for 4K HDR playback.
Display Spatial Awareness
Reads macOS Display Arrangement coordinates automatically. Movie Lights knows which screen is physically mounted on top and routes illumination straight down.
Black Bar Letterbox Bypass
2.39:1 cinemascope movies have thick black borders. Our dynamic pixel scanner penetrates past the letterbox bars to extract pure scene lighting every frame.
Room-Illuminating Brightness Overdrive & Gaussian Diffusion
Laptop screens can look muted in dark rooms. Movie Lights applies non-linear gamma curves, multi-zone color blending, and an adjustable 100%–300% brightness overdrive that casts physical light across your keyboard and walls.
Effortless Setup
Zero hardware. Setup in 30 seconds.
No LED strips stuck with peeling tape, no extra HDMI cables, and no proprietary power bricks. Just seamless Mac software.
Launch From Menu Bar
Movie Lights lives unobtrusively in your macOS status bar. It grants Screen Recording permission with a single standard macOS prompt.
Play Any Video or Movie
Put on your favorite 4K Blu-ray rip in IINA/VLC, stream in Safari or Chrome, or queue up Netflix, Apple TV, or Plex on your main monitor.
Hit 'Start Lights' & Enjoy
Your bottom screen instantly morphs into an ambient light bar. Adjust brightness or blur on the fly using the sleek floating bottom HUD.
Download Movie Lights for Mac
No paid plans. No subscriptions. No credit card required. Download the app today and upgrade your multi-monitor movie nights for free.
Movie Lights
Universal macOS Binary • Version 1.0
Frequently Asked Questions
Got questions? We've got answers.
How does Movie Lights sample the movie without slowing down my Mac?
Movie Lights uses Apple's native ScreenCaptureKit framework, introduced in modern macOS. Instead of taking slow software screenshots, it streams directly from the GPU framebuffer using zero-copy memory buffers. CPU usage typically remains under 2%, even during 4K 60fps playback.
Can I adjust the brightness and colors while watching in fullscreen?
Yes! Movie Lights places an ultra-sleek, floating translucent HUD directly on your ambient display. You can slide brightness from 100% to 300%, adjust Gaussian blur radius, or fine-tune color zones without touching your keyboard or exiting full screen.
What if my movie has black bars (letterboxing)?
Movie Lights features a smart letterbox detection algorithm. When playing 2.39:1 widescreen films or anamorphic cinema, it dynamically scans past the black horizontal bars to capture the genuine movie colors rather than black pixels.
Does this work with Netflix, Apple TV, and streaming sites?
Yes. When streaming movies through browsers like Google Chrome, Brave, Firefox, or playing local media via IINA, VLC, Plex, or QuickTime, Movie Lights captures colors accurately. (Note: Safari applies strict FairPlay hardware blanking to certain proprietary DRM streams; playing via Chrome or dedicated media players is recommended for unrestricted ambient capture).
Which macOS versions and Macs are supported?
Movie Lights supports macOS 14 Sonoma and macOS 15 Sequoia (and newer). It is a Universal binary natively optimized for Apple Silicon (M1, M2, M3, M4 all variants) as well as modern Intel Macs.
Is Movie Lights really free?
Yes! Movie Lights is 100% free to download and use. All features, full 60 FPS ScreenCaptureKit performance, letterbox detection, and future updates are included without any paywalls, subscriptions, or credit card requirements.