If you get a keyboard that supports QMK/Via etc there’s no such thing as a Mac layout because you can just map the keys as you see fit.

I can’t speak to the K7 specifically, however I bought a Keychron K2 back in 2020 and it got me into the hobby. Solid build quality and still going strong almost four years later (not by me, I’ve gone down the rabbit hole but it is my sons daily driver).

Look at Keychron. Wide selection of boards. Pretty solid build quality and reasonably priced!