Dim Every App but the One You're Working In on Your Mac
macOS can't dim apps. Its Focus feature only silences notifications. Moor's Zone mode adds the visual part: it dims everything except your working apps, and nothing gets closed or quit. Turn it on from Moor's menu bar under Modes, or run it from a Shortcuts action. To use it with a Focus Timer, start the timer and turn on Zone mode yourself. Moor's documentation doesn't say Zone mode follows the timer on its own.