I wish this worked. I tried it. The problem is pressing shift only modifies the keyboard that it is pressed on.

If you install Karabiner Elements[1] on macOS, all modifier keys suddenly work across all keyboards.

I'm using one "TKL" Apple USB keyboard per hand when I feel like opening my shoulders a bit. Took me all of two minutes to get used to, at a fraction of the cost for enthusiast keyboards. I wonder if there are any ergonomic advantages I'm missing out on.

(Karabiner Elements is a great tool, anyway; I've been using it for a long time to map Caps Lock to something useful for programming.)

[1] https://karabiner-elements.pqrs.org

Thanks for posting this! I had a split keyboard and typing on it felt so much better if not for the non standard stagger.

I now feel less guilty for having two 60% mechanical keyboards. :)

I think that's the case on Mac OS and Windows, but on Linux you can press Shift/Ctrl on one keyboard, and a letter on another.

Alt doesn't seem to work though.

problem is you'd then need to place them quite far apart from each other (while many of the "fixed" split keyboard have each half only slightly tilted) but... From an USB point of view I think this just works?