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How to make the MacOS app switcher appear on all displays

If you have multiple displays connected to your Mac, you may have noticed that the app switcher (cmd+tab) only appears on the display where the Dock is located. This is mildly annoying if you happen to be looking at the other display.

But it’s possible to have the app switcher appear on all displays, so it’s always visible in the display you’re looking at:

defaults write com.apple.dock appswitcher-all-displays -bool true

You’ll need to restart the Docker for this change to be picked up:

killall Dock

Found this tip on this StackOverflow answer.