Turn Mac’s Menubar into a Timer using Timebar: There are a ton of timer apps available but Timebar is different from all. It is a simple countdown timer clock work in your Mac’s menu bar. It is a simple app with nice concept. The basic aim is to show countdown on your Mac’s screen.
Timebar uses length type countdown. When you click on the menu bar icon to see a live countdown, showing exactly how much time is left. Timebar can now play a sound when your time is up. Timebar is available on Mac App Store for $3.