Single Dell Ultrawide connected to PC and MacBook Pro
 

I am having a terrible time trying to connect all my devices so hoping someone here can point me in the right direction...

I have a*Dell U4025QW which I use with my personal desktop pc (Alienware R15 Intel 13900KF & RTX 4090),*a humanscale m/connect 3 pro dock*monitor arm combo, and a 2021 MacBook pro M1. Trying to connect all of this together as efficiently as possible with minimum wires/clutter.

The Alienware is my personal pc that I use primarily and want to make sure it is displaying as 5K 120hz on the monitor - the macbook is my work laptop that I plug in to use on days I WFH. I have one wired keyboard + a wireless mouse (both Alienware if that matters) that I'd like to be able to share b/w both computers using the Dell monitor’s KVM.

Lastly, preference is to utilize all the m/connect dock inputs under the desk first and then anything else plugged into the monitor ports for ease of cable management. The mconnect has a single usb c cable that plugs into the MacBook and I would like to keep that a single connection so I am not maneuvering multiple wires every time I take the MacBook to work.

Is the above setup possible? What additional cables / hubs / adapters do I need and in what order should the devices be connected? I have scoured Google, reddit, dell and Humanscale support with no luck. I was told I need a display link compatible adapter if my computers don’t have alt DisplayPort - this is where one of the support people suggested this startech adapter but, without any clarity on where this even connects.

Any help appreciated!!

Yeah, you can totally do this. Alienware should go DisplayPort → Dell directly for full 5K120Hz. MacBook goes USB-C into m/connect dock. Keyboard and mouse should plug into the Dell monitor for KVM to switch cleanly.

Just be careful – not all USB-C cables handle full DP Alt Mode. Get a good brand one. ;)