Just wanted to point out that disabling SIP is not required to use most of yabai's window management features.
You do lose some features[0] but I've found the only ones I really care about is focusing spaces, and you can create keyboard shortcuts for that in System Settings.
I want to echo this as well. I use a 2nd tool to help me add additional i3-like keyboard shortcuts as well (I have the ability to "stack" windows with Alt-S and rotate through them with Alt-J and Alt-K).
Here it is. There is no visualization of the stack, which apparently Stackline in the other comment supports, but I don't tend to need that. Just being able to move between the windows is good enough for me.
[0]: https://github.com/koekeishiya/yabai/wiki/Disabling-System-I...