[MarcelOlsz]

I went to hell and back trying to get PIP/PBP monitors on my 57" g9 ultrawide to work with my M2 pro. ended up having to use a powered hdmi dongle, displaylink cable, and displayport, with 3 virtual monitors via betterdisplay. Allowing resolutions outside of macs limitations setting in BD is what did the trick. I don't envy OP. Having 5120x1440 @ lodpi was the worst, just ever so slightly too fuzzy but perfect UI size but eventually got a steady 10240x2880 @ 120hz with HDR. I literally laughed out loud when I read the title of the thread. Poor guy.

[jakehilborn]

You may be able to get this working using PBP and 2 cables without virtual displays. This is my write up for using HiDPI@120hz for two 57” G9s on my M2 MacBook. https://www.reddit.com/r/ultrawidemasterrace/s/VrBLFDxYzg

[MarcelOlsz]

Ah but you see, the challenge is to get a 3-split PBP on an M2 pro on a monitor with a native res of 7680x2160, each one scaled down 33%, working at 120hz with HDR, all hidpi like so:

  ┌─┐┌────┐┌─┐
  │ ││    ││ │
  └─┘└────┘└─┘

It creates some wonky math and requires plenty of dock and cable shenanigans and unlocking resolutions above 8k via BD. It's the third "monitor" where it gets tricky with the M2 pro especially at these resolutions.

[fragmede]

Fascinating. What's that gain you over using the monitor's native resolution full screen vs PBP mode?

[MarcelOlsz]

I hate spending any unnecessary clicks or keyboard shortcuts on getting whats out of my head into the computer. I used yabai before primarily, now using aerospace. Since the monitor is super ultra-wide (57 inches with a very high DPI) the native resolution makes everything ultra small to my eyes. It's the same height as my 34-inch Samsung G5s which are 1440 pixels tall natively, but since this one is 2160, it would have to be 1.5 times larger physically to look decent at native res especially on macOS. The only other option is to scale the UI 1.5x which is where all the problems begin.

I like the three-column separate monitor layout because I have hotkeys, primarily driven by my mouse but also usable keyboard-only where I can easily switch between monitors with `⌘+`` which moves my cursor between them. I can select whichever monitor I want and put my mouse to it, and I can switch to any workspace on any monitor quickly. I also have hotkeys that sync three workspace numbers across monitors, so switching between them switches all AeroSpace workspaces on all three monitors simultaneously. If I have five projects going, I'd have the terminal on the left, Linear and other communication tools on the right in accordion mode with AeroSpace, and I can use my mouse or keyboard exclusively to find exactly what I'm looking for almost as fast as I think of it. I spend zero time on window management or organization now so it makes it thoughtless to use.

If I'm just using the monitor's native resolution there's no real way to do portals — having two apps open as sticky and only switching a portion of the monitor space to a different app while keeping the other sticky. There are hacks you can do with AeroSpace, especially since AeroSpace doesn't use native macOS Spaces, but the three-monitor layout is a much more robust approach in my opinion just a bit of a nightmare to setup. Theres a million little mac annoyances you have to fix.

[MarcelOlsz]

...And then there is the near-infinite trickle down of apps that rely on apps that rely on arcane configs and so on. This is truly the OS from hell. At least with Windows you know it's going to be garbage so when anything works on any level you are maximally impressed. But I have to spend my weekends isolating window shadow disabling functionality from yabai into it's own binary because I switched to aerospace which requires 'displays have separate spaces' to off, which just so happens to be exactly what yabai requires to be on, to remove window shadows, which is the only use I have left for it.

Just like the excel world championship I would find a macos ricing/window tiling competition equally enthralling. You read articles like the OP and at some point all you can do is laugh because lord (Cook) knows you've cried.

[moeadham]

betterdisplay is a life saver