If you’ve plugged an HDR monitor into your Mac, you’ve probably hit this wall: turn on HDR and macOS locked you to a cramped native resolution, pick a comfortable scaled setting and HDR vanished. macOS 27 HDR support finally fixes that, letting you run HDR and a scaled resolution like 2560 x 1440 at the same time. The catch is that it doesn’t seem to work on every Mac yet.
Here’s the short version before we get into the details.
- The fix: macOS 27 Golden Gate keeps the High Dynamic Range toggle working when you choose a scaled resolution on a third-party HDR10 display.
- Where: System Settings > Displays > High Dynamic Range.
- Confirmed working: an M4 MacBook Pro, in testing by 9to5Mac published October 5, 2026.
- Not working: the same test on an M1 Max MacBook Pro, even on macOS 27.
- Cost: free, as part of the macOS 27 update.
So if you own a recent Mac and an HDR monitor, this is worth checking today.
The Old Trade-Off: HDR or a Usable Screen, Never Both
On macOS 26 Tahoe, enabling HDR on a third-party monitor forced you onto a limited set of resolutions. Select a scaled option such as 2560 x 1440 and the HDR switch simply turned itself off.
That hurt most on big 4K panels. As 9to5Mac’s Jeff Benjamin noted while testing Dell’s 32-inch UltraSharp U3226Q, the HDR-friendly fallback of 1920 x 1080 “greatly reduces the available screen real estate.” Everything looks huge, and you fit far less on screen.
Most people chose the scaled resolution and gave up HDR. That meant paying for an OLED or HDR monitor and never seeing what it could do.
How to Turn On macOS 27 HDR at a Scaled Resolution
Once you’re on macOS 27, setting this up takes under a minute. Follow these steps with your external monitor connected.
- Open System Settings and click Displays.
- Select your external monitor if you have more than one screen.
- Pick a scaled resolution, for example 2560 x 1440 (“Looks like 2560 x 1440”).
- Switch on High Dynamic Range. On supported Macs, the toggle now stays available instead of disappearing.
- Open an HDR video or photo to confirm highlights look brighter than the rest of the screen.
If the toggle greys out or switches itself off again when you change resolution, your Mac likely isn’t covered yet. The troubleshooting section below has a few things to try.
Which Macs Get the Fix (and Which Don’t Yet)
Apple hasn’t published a list of supported models for this change. What we have so far comes from hands-on testing, summarised below.
| Mac | Running macOS 27 | HDR + scaled resolution together |
|---|---|---|
| M4 MacBook Pro | Yes | Works (confirmed in testing) |
| M1 Max MacBook Pro | Yes | Doesn’t work (both settings can’t be selected) |
| Other Apple silicon Macs (M2, M3, M5, M6) | Supported by macOS 27 | Unconfirmed, so test it yourself |
The M1 Max result suggests this depends on the display hardware inside the chip, not just the software. Newer chips look like the safer bet, but treat anything outside the tested models as unknown until Apple or more testers confirm it.
If you’re shopping for a new desktop to pair with an HDR monitor, our look at the M6 Mac mini’s price and specs covers Apple’s newest chip.
If the HDR Toggle Still Disappears, Try This
Before you blame your Mac’s chip, rule out the usual suspects. Apple’s own HDR support guide lists most of them.
- Make sure the monitor supports HDR10 and that HDR mode is enabled in its own on-screen menu.
- Update the monitor’s firmware from the maker’s website.
- Use a good Thunderbolt, USB-C or DisplayPort cable, or an HDMI cable and adapter rated for HDR.
- On a MacBook running on battery, turn off “Optimize video streaming while on battery” in Battery settings.
- Check for point updates to macOS 27, since display fixes often land in later releases.
If all of that checks out and the toggle still won’t stay on at a scaled resolution, your Mac is probably one of the models this change doesn’t cover yet.
The Bigger HDR Upgrade Hiding in macOS 27
The scaled-resolution fix isn’t the only display change. According to 9to5Mac, macOS 27 also adds wider native HDR across the system, with brighter highlights, HDR-aware cursors and a punchier, higher-contrast look.
That benefits Apple’s Studio Display XDR and Pro Display XDR, plus third-party OLED monitors. Put simply, an HDR monitor on macOS 27 does more than play HDR movies. The whole desktop starts to use that extra brightness.
For everything else that changed in this release, see our guide to the macOS 27 Golden Gate release and supported Macs.
Frequently Asked Questions
Why does HDR turn off when I change resolution on my Mac?
On macOS 26 and earlier, HDR on third-party monitors only worked at a limited set of resolutions. Choosing a scaled setting like 2560 x 1440 switched HDR off automatically. macOS 27 removes that limit on supported Macs.
Does macOS 27 HDR work at scaled resolutions on every Mac?
No, not based on current testing. It worked on an M4 MacBook Pro but not on an M1 Max MacBook Pro. Apple hasn’t published an official list, so check your own Mac in Displays settings.
Do I need a special monitor for HDR on a Mac?
Yes. Your external display needs to support HDR10, and you need a compatible Mac and cable. Apple’s built-in XDR screens and Pro Display XDR also support Dolby Vision and HLG.
Will HDR drain my MacBook’s battery faster?
It can, which is why macOS may limit HDR video on battery. Turning off “Optimize video streaming while on battery” lets HDR play unplugged, at some cost to battery life.
Our Take: Worth Five Minutes of Testing
This is one of those small fixes that matters more than any headline feature if you work on an HDR monitor every day. If you have an M4-class Mac or newer, update to macOS 27, open Displays, and turn HDR back on at the resolution you actually like. If you’re on an M1-era Mac, don’t buy a new HDR monitor just for this yet. Wait until more models are confirmed, because right now the fix looks tied to newer hardware.
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