I’m in the middle of testing Dell’s 32-inch Ultra Sharp U3226 Q, and my thoughts so far are extremely positive. The picture quality of this OLED panel is impressive, especially when HDR is enabled in macOS. I’ll have a full hands-on review of the Ultra Sharp on our YouTube channel. Meanwhile, I wanted to note a key improvement Apple introduced in macOS 27 regarding HDR support.
A drawback of using an HDR-ready third-party monitor on macOS 26 Tahoe was the inability to activate High Dynamic Range at the common 2560 x 1440 scaled resolution. Fortunately, the newest macOS release resolves this problem. If you’re using an HDR10-capable third-party display with macOS Tahoe, you’ll see a High Dynamic Range toggle in Settings → Displays. When that switch is flipped, HDR content will be viewable.
But notice that I’m running the display at a resolution of 1920 x 1080, which is exactly 2x the pixel-doubled resolution of this 4K UHD display’s native 3840 x 2160. Most users probably don’t want to run at 1920 x 1080 because it makes content appear too large on a 4K display. The problem is that when you select a scaled resolution on macOS Tahoe, HDR is disabled.
Thankfully, this issue has been fixed in macOS 27 Golden Gate. You can have both a scaled resolution selected and HDR enabled simultaneously. This is a native option, and no third-party software is involved. So if you’re running a third-party HDR display, this feature alone makes upgrading from macOS Tahoe to macOS Golden Gate worth it, in my opinion. Granted, this is on my M4 MacBook Pro. I tried the same thing on my M1 Max MacBook Pro, but I couldn’t select both settings at the same time, even though I was running macOS 27, so there are apparently hardware requirements as well.
Source: 9to5Mac · Summarized by HeadlinesBriefing