I got a DeLock KVM switch recommended by the shop vendor (who actually did spend a good 15 min understanding my need and doing web searches), and quickly confirmed by ChatGPT as a solution to my need (plug the work macbook alongside my personal linux tower, no exchange of data between hosts, no driver needed, and do a KVM switch).

I actually end up using 2 mice and switching the keyboard from bluetooth (for the mac) to usb (for the linux) because I can't get usb working through the HDMI. And the screen is limited to 120hz (instead of 144hz) because of the switch quality or the HDMI cables, I do not know (it lights up and works for a minute and then goes black a few seconds every few seconds, losing sync).

In the end it is more tedious and less featureful than just plugging the mac to the screen via a USB to HDMI cable, switching everything from the screen (and doing the same mice / keyboard juggle than above), because at least I would get the 144hz and save the 150€ from the switch. I can't return it anymore because the 15 day window has passed so I still use it, it's a little bit easier to switch from the remote control than from the screen anyway, but that's expensive just to switch from a different button.

After thirty years of attempted-KVM, I finally stopped leaking $hundreds$ on hardware – and instead just bought a bigger desk.

With a VESA-mounted LCD I have enough physical desktop space for three full-sized keyboard/mice combos (and don't have any disconnect/phantom issues common with KVM switching). Without the NUMPAD, two would fit on most desks, IMHO.

----

Of course I also recommend having multiple physical desktop spaces, set up for certain routine tasks (e.g. billing/taxes, music/media/TV/hub). Don't know how I used to operate on a single 13" laptop!~

----

>120hz (instead of 144hz)

Can you actually notice a difference? My LCD supports both and I use the lesser one just because it reduces energy consumption. I think I can tell between 60Hz/120Hz.