You're right and I will move to ultrawide as soon as I get one I can drive with a reasonable graphics card and that covers the same area as my 3*32" 4K at this moment. Vertical resolution below 2160 isn't acceptable for me. And yes, I do use up all of that on a daily basis so I'm not interested in anything lower res.
I can only run it at 60 Hz in Big Sur with my Intel 2014 Mac mini, but that was also true with Catalina.
Which cable fixed it for you? I have an M1 Mac mini & Samsung 49” and can’t get 5120x1440 at any refresh rate...
Thanks, indeed it does now but only after I downgraded the monitor's DP version from 1.4 to 1.2. With DP1.2 enabled the C49RG9x is finally detected correctly by my Mac mini M1 after sleep / shutdown etc. and with the SwitchResX daemon enabled drops straight into 5120x1440 @ 120Hz - woot! DP1.2 was actually the key
I din't need more than one, I'm already running 5K2K with my Air extended display — more than enough real estate for me. I just want to know if Apple will limit scaled HiDPI resolutions instead of letting me run 4454x1879 instead of nearly-illegible 5120x2160. The largest HiDPI option the M1 Air has is a ridiculous 3072x1296 — that's a Fisher-Price baby toy.
It looks like from specs that all M1 limits are still the same on the M2. Unless it's a macOS thing it's likely still a limit.
At the same time, my Studio Ultra is currently connected to four monitors. I suspect the low end chips will always be display limited, but the higher end ones of the same family will be less so. It will be fun to see what they do with the Mac Pro. In all honesty, I can't see how they could add PCIe expandability without slowing the entire system down.
And it's ridiculous and arbitrary. My M1 Air drives native 5880x2160 like it's nothing, but it can't do HiDPI? I can do it with BetterDummy (highly recommended, along with SwitchResX) but dummies add some complications to my setup that make it not ideal for use with Adobe design apps.
In a new support document, Apple has acknowledged that when an ultrawide or super-ultrawide external display is connected to a Mac with the M1 chip, some resolutions supported by the display may not be available currently.
Apple says it is aware of this issue and has a solution planned for a future macOS update. Apple did not specify exactly when a fix will be available, but the first beta of macOS 11.2 was seeded last week, so that is one possibility.
To see additional resolutions for your external display, click on the Apple logo in the top-left corner of your Mac, open System Preferences, click Displays, and press and hold the Option key while you click "Scaled."
There is a running thread about this issue in the MacRumors forums.
Article Link: Apple to Fix Resolution Issue With Ultrawide Displays on M1 Macs in Future macOS Update
