My tentative conclusion as a layman in this stuff is that this mode is somehow supported by the display but not advertised (in EDID?), and some bug in this Display Menu app causes it to try to switch to a mode that it shouldn't try. If the Lenovo is the primary display, putting it into mirroring from the third-party app results in both displays at 1440p When comparing BetterDummy and deskreen you can also consider the following projects: one-key-hidpi - Enable macOS HiDPI and have a native setting.Doing the same mirroring through Settings puts both displays into 1440p.Text looks fine when it's surprisingly 3360x1890.Other than just being surprising, I am interested in what's going on here because it would be nice to run this thing at 3360x1890 when not mirroring, even if it turns out to be at 30hz. Even though even this app, even while mirroring and the resoluton being listed at 3360x1890 in the tool, the tool doesn't show this resolution in the dropdown as it normally does the "select" res along with other options.
Issues 75 Discussions README. But when I use this third-party "Display Menu" app to ask for mirrored displays, the Lenovo P27-h10 runs at 3360x1890. Unlock your displays on your Mac Smooth scaling, HiDPI unlock, XDR/HDR extra brightness upscale, DDC, brightness and dimming, dummy displays, PIP and lots.
#Betterdummy macos manual#
I run it at 3200x1800.Įvery manual and tool reports the Lenovo p27h-10 as a 1440p display. Launch the Terminal app on your Mac from the /Applications/Utilities folder. Its due to a limitation behind the scenes with the macOS Quartz virtual display mirroring. I have a 1440p thunderbolt monitor (Lenovo p27h-10) and a 4k DP monitor. The free app BetterDummy resolves the resolution issues on M1 Apple Silicon, with one major drawback: You lose HDR support Thankfully its easy to toggle BetterDummy as needed, but thats the current situation.
#Betterdummy macos mac os x#
I have an odd behavior on my home system that I was hoping someone could explain or at least provide more puzzle pieces to. screenresolution Command line utility for getting, setting and listing display resolution on Mac OS X 10.
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