GoKawiilmacOS 27 enables HDR at scaled 2560x1440 resolution on third-party displays
Apple's macOS 27 update fixes a limitation from macOS 26 Tahoe that prevented HDR from being enabled on third-party HDR10 monitors when using scaled resolutions like 2560 x 1440. Previously, users had to drop to native-doubled resolutions such as 1920 x 1080 to access HDR, sacrificing screen real estate on larger 4K displays. The fix was observed while testing Dell's 32-inch UltraSharp U3226Q OLED monitor.
GoKawiil's interpretation of the reporting above, not reported fact.
The change removes a tradeoff that forced users of high-end third-party monitors to choose between HDR visuals and practical screen space, which could make macOS more appealing paired with non-Apple displays. This suggests Apple is improving external display compatibility as more premium HDR monitors, like Dell's OLED UltraSharp line, enter the market as alternatives to Apple's own Studio Display.
- macOS 27 allows HDR to work at scaled resolutions like 2560x1440 on third-party monitors.
- macOS 26 Tahoe required dropping to native pixel-doubled resolutions such as 1920x1080 to use HDR.
- The improvement was noted during testing of Dell's 32-inch UltraSharp U3226Q OLED display.
Dell UltraSharp U3226Q 32-inch 4K OLED Monitor — This is the very monitor at the center of the article, and its OLED panel delivers the kind of punchy HDR that now finally works properly with macOS's 2560x1440 scaled resolution. If you want a Mac-friendly HDR display to take full advantage of macOS 27's fix, this UltraSharp is a great pick for crisp text and vivid contrast.
See Dell UltraSharp U3226Q 32-inch 4K OLED Monitor on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: 9to5mac.com — Jeff Benjamin, 2026-10-05
Published there as: “macOS 27 just fixed the most annoying problem for third-party HDR displays”
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