The short answer
Lunar is a capable, well-built app. Its real strength is external-monitor control: DDC hardware brightness, ambient adaptation, display sync, and input switching. Boosting your built-in MacBook Pro or XDR screen is something it can do on the Pro tier, but it’s one feature inside an app built for something wider. If that one feature is all you need, MacBrightness does it for $5, with nothing extra to configure. One thing to know up front: Lunar’s free tier doesn’t brighten your built-in screen at all, because the boost is a Pro feature. So for a brighter MacBook Pro screen you’re comparing $5 with Lunar’s $23 Pro tier, not with free. And if you only want to test whether the extra brightness helps you, Lunar’s free tier leaves your screen at the same macOS cap and shows you nothing new. MacBrightness’s free Splitscreen Mode is the one $0 test that puts the brighter screen in front of you.
Here’s how the two compare on the things that matter for built-in screen brightness.
| MacBrightness | Lunar | |
|---|---|---|
| Price (one-time) | $5 | Free tier; Pro $23 |
| Subscription | No | No |
| Free trial | Splitscreen Mode (free forever) | Free tier available |
| Built-in MacBook Pro brightness boost | Yes | Pro only |
| Pro Display XDR brightness boost | Yes | Pro only |
| External monitor control (DDC) | No | Yes, core feature |
| Ambient light adaptation | No | Yes (Pro) |
| Display sync / input switching | No | Yes (Pro) |
| Supported Macs | MacBook Pro 14″/16″ (M-series Pro/Max), Pro Display XDR | macOS 11+, broad |
| Setup | Install and go | Configuration recommended |
What Lunar gets right
Lunar is the serious tool for people managing a desk full of monitors. DDC control means it talks directly to the hardware in your external display, adjusting brightness at the panel level rather than through software overlay. That’s a meaningful technical difference for color-accurate work. Add ambient-light-based dimming, screen sync so two monitors track each other, and input switching, and you have an app that earns its place on a power-user’s dock. The free tier is also useful; you don’t have to pay anything to get basic brightness sliders. The developer has maintained it for years and it has a real user community.
Where MacBrightness comes in
The typical search for “lunar mac brightness” or “Lunar alternative” often comes from a MacBook Pro owner who read about Lunar, downloaded it, and then realized they’re navigating a settings panel built around monitors they don’t own. That’s not a knock on Lunar. It’s just a different scope.
MacBrightness is purpose-built for one thing: opening the brightness range Apple keeps in reserve for HDR content so it covers your whole screen, on the keys you already press. Think of it like a car whose governor is set below the engine’s real top speed. The panel can go up to about 1,600 nits, but macOS caps standard mode well below that. MacBrightness lifts that cap, system-wide, with no low-level hacks. macOS still eases off the peak if the panel runs warm.
There’s no DDC in this picture because your built-in display doesn’t use DDC. There are no ambient sensors to configure because you’re not on a desk setup. For the 14”/16” MacBook Pro owner who wants a brighter screen outdoors or in a bright room, the whole feature list fits in a sentence.
The price difference matters too. You’d pay $23 for Lunar Pro to get the brightness boost, on top of learning the rest of the interface. MacBrightness is $5 one-time, and setup takes about 10 seconds.
Which should you buy?
Choose Lunar Pro if you’re running external monitors and want the best-in-class tool for controlling all of them, including DDC hardware brightness, ambient adaptation, and input switching. At $23 it’s fair value for that job. The built-in brightness boost comes along for the ride.
Choose MacBrightness if your goal is a brighter built-in MacBook Pro or Pro Display XDR screen, period. It does that job for $5, starts working immediately after install, and doesn’t ask you to configure anything you don’t need. Splitscreen Mode also lets you see the brighter screen for free first, which Lunar’s free tier can’t show you, since its boost is locked to the $23 Pro tier. And if you add external monitors down the road, you can buy Lunar then.
If you’re weighing more options, the best MacBook brightness apps guide runs through the full field, and Vivid vs MacBrightness covers the other main alternative if Lunar isn’t the right fit.