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 a nice concept. The basic aim is to show the 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.