Open up some window from the Mac OS menu bar. Now use the keyboard to switch away from it. Try to switch back with it to it with the keyboard. It doesn't work u

Open up some window from the Mac OS menu bar. Now use the keyboard to switch away from it. Try to switch back with it to it with the keyboard. It doesn't work unless you have some third-party window management tool to fix the problem. I have tried and I can give you a whole catalog of features that don't work with the keyboard.