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Not optimal but should be able to hover or option+hover on the green circle to tile or position windows side by side.

https://support.apple.com/guide/mac-help/work-with-app-windo...

There is rectangle, which has nice keyboard shortcuts, but it is a 3rd party addon.

This can be assigned a kb shortcut fyi. I'm currently using rectangle as well, but the built in tiling is ok if you just need a L/R split

Something like i3 is all I want for productivity. I use Yabai but it's just not the same.

You can use BetterTouchTool and configure it to tile an arbitrary amount of windows. As a bonus those windows don't have to be in full-screen mode, so you can cmd-tab quickly.

I agree that the windowing system of MacOS is an unusable mess.

I use the Magnet.app extension, which supports basic tiling commands on MacOS.

Pop Shell extension will give you something close.

They were talking about MacOS, not GNOME.