Menubar Countdown Specifications
Put a simple menubar countdown timer into the macOS menu bar.
Menubar Countdown is a simple countdown timer displayed in the macOS menu bar. It can be used as a pomodoro timer, to remind yourself to get back to work after a break, or whenever you want to quickly set a time limit on some activity.
To set the timer, click the menu bar icon and select the Start... menu item. A dialog will appear allowing you to specify the countdown time in hours, minutes, and seconds. The dialog also allows you to specify which of the following forms of notification you want when the timer gets down to 00:00:00:
Unmount drives and volumes from the menu bar quickly.
Displays system information in the menu bar.
Create your own start menu for your Mac OS X.