Rectangle is amazing and I highly recommend it, but it's a window manager and not a display manager.

Another window manager https://ianyh.com/amethyst/

I have tried Amythyst.

Yabai, didn't try since it wants to disable system integrity protection. Not sure if will work in locked down corporate machines.

Now back to Rectangle and arranging the windows myself in multiple desktops.

You can get value out of yabai even without disabling SIP to add the hooks into Dock.app. The things it needs that for isn't that long of a list, see the first bulleted list here https://github.com/koekeishiya/yabai/wiki/Disabling-System-I... , maybe you don't need those / can replicate them without yabai?

When I initially read this on that page,

> The following features of yabai require System Integrity Protection to be (partially) disabled:

, I thought that meant "so yabai just won't work at all if you don't disable SIP", but it's not the case at all. I use hammerspoon to deal with spaces, and don't care about window transparency/shadows/animation, and I don't know what "picture in picture for any window" means. I do miss stickiness and per-window floating (which are features I used in XMonad), but it's fine, I'm not going to disable SIP for those.

Particularly, if you just want focus-follows-mouse like in X Windows, yabai gives you that without disabling SIP.