There are tools like Magnet and such that help. Window management is maybe the worst part of macOS and it’s worse after each release of macOS.

I've been using Amethyst for a few years now. It's not exactly a separate WM in terms of changing the window decorations, but it's more of a kind of an automation layer that works through the Accessibility access layer of MacOS. I've been relatively happy with it. The only bad thing is that because the Command key is used for so much in MacOS, it tends to need to be chorded with multiple modifier keys to ensure that there aren't keyboard shortcut clashes.

https://ianyh.com/amethyst/

There is no real window manager on macOS, only hacks that fall apart very soon.

I've been issued a Mac Laptop for work, and for the first 2 months by far the #1 issue for me was the alt-tabbing (edit: always been a Linux/Windows user).

I've been successfully using Witch to restore normal window-tabbing (in place of application-tabbing): https://manytricks.com/witch/

Unfortunately after MacOS ~Vista~ Catalina you still need to grant Witch permissions for each application you're alt-tabbing to that Witch hasn't seen yet, but considering I use ~6 apps 99% of the time, this works for me.

To get simple window tiling/placement, I found BetterSnapTool to be sufficient for my needs: https://apps.apple.com/us/app/bettersnaptool/id417375580?mt=...

It handles magnetic corners and placement via hotkey. I mostly work with a dock and external keyboard, so I bound CMD+SHIFT with numeric keypad buttons to reflect the placement (e.g: CMD+SHIFT+NumKey7 -> put the window in the top-left corner). I don't miss the hotkeys when I'm without dock because anyway the screen would be too small, so I resort to just alt-tabbing.

I think there's something called 'Yabai'.

EDIT: https://github.com/koekeishiya/yabai

https://rectangleapp.com/ works really well with OSX. Does everything wayland and others on linux in OSX and performs really well.