I'm working on this project right now - and I'm looking at everything from chassis to screen from scratch. (unfortunately, v0.1 here is probably going to be B&W). Hoping to have a working prototype in the next few months.

WavShare is probably my rec for e-ink screens and drivers (https://www.waveshare.com/13.3inch-e-paper.htm). You can find those with partial refreshes and HDMI driver boards.

For the driver - the Glider project has some good progress to drive the display and how-tos. See https://gitlab.com/zephray/glider

Agree with other comments - MacOS and other existing software aren't designed for this - I'm writing my own. Scrolling, mouse-dragging and dark mode are just a few of the annoyances. (I have the Dasung 25" as well and it gets frustrating).

Also happy to hop on a call and chat more about this stuff