> The core technical challenge, as you can imagine, came from trying to do something that Apple otherwise does not allow

I think the main question most would ask is what affordances can you give or details you can share to prove that this will continue working in future versions of the os since the foundations seem brittle.

I use Wallpaper Engine on windows for one purpose mostly to avoid burn in since my monitors are always on but I've grown to like it over the years and would like to try something on mac but would hate to purchase software that stops working or future update comes with a readme of how to "re-enable" it.