MacBook Air
MacBook Air brightness, honestly
Straight answer: the Air can't be boosted brighter than its rating — it has no XDR headroom, only the 14/16-inch MacBook Pro does. But if your Air looks dim, that's usually fixable, and you candim it below the minimum for night. Here's the whole picture.
Eclipse night-dimming works on every Air · Boost needs an XDR Mac
Why the Air can't go brighter
The M1 Air is rated at 400 nits; the M2, M3, and M4 Airs at 500. Those are standard Liquid Retina panels. What lets a MacBook Pro go far brighter isn't software — it's the XDR display's reserved EDR headroom, the extra range macOS keeps for HDR. The Air simply doesn't have that reserve, so there's nothing extra to unlock on the bright end.
Be wary of any app promising to boost an Air past its rating. macOS reports a headroom value that can look higher than it really is when brightness is low — which can make boost seem to “work” while just washing out the image. LUMEL deliberately won't enable boost on a display without genuine XDR support.
See the full model list: How many nits is your Mac? →
If your Air looks too dim
Nine times out of ten it's an automatic setting, not the hardware. Turn off Automatically adjust brightness (Displays) and Slightly dim the display on battery (Battery), and your Air will hold one steady, brighter level. If it only dims when warm or on low battery, that's thermal or Low Power Mode behaviour.
Full walkthrough: Mac brightness keeps changing by itself →
MacBook Air brightness, answered
How many nits is the MacBook Air?
The M1 MacBook Air is rated at 400 nits. Every Air since — M2, M3, and M4, in both 13-inch and 15-inch sizes — is rated at 500 nits. These are standard (non-XDR) Liquid Retina panels.
Can I make my MacBook Air brighter than 500 nits?
No. The Air's display has no XDR/EDR headroom — there's no reserved brightness to unlock, unlike the 14- and 16-inch MacBook Pro. Boost apps (including LUMEL) can't push an Air past its rating, and any app that claims to is misreading the hardware. Your real options for a too-dim Air are the troubleshooting steps below.
Why does my MacBook Air look dim?
Usually auto-brightness reacting to the room, or 'slightly dim on battery.' Turn off System Settings → Displays → 'Automatically adjust brightness,' and Battery → 'Slightly dim the display on battery.' If it dims after a minute, that's the display-sleep timer or Low Power Mode.
Can I dim my MacBook Air below the minimum?
Yes — this part works on every Air. LUMEL's Eclipse mode dims up to 70% below the macOS minimum, for dark rooms and late-night reading. Dimming needs no special hardware, so the one thing the Air can't do (boost) is separate from the thing it can (dim).
The one thing your Air can do.
LUMEL's Eclipse mode dims your MacBook Air below the macOS minimum for dark rooms and night — free, no usage limits, no account.