using pixel fonts on any non-integer multiplier of the native resolution will always result in horrible font rendering, I don't care what OS you're on.

I use MacOS on all kinds of displays as I move throughout the day, some of them are 1x, some are 2x, and some are somewhere in between. using a vector font in Zed looks fine on all of them. It did not look fine when I used a pixel font that I created for myself, but that's how pixel fonts work, not the fault of MacOS.