However in the Mac OS, the task manager comes with a different name, in the Mac OS, it is called the Activity monitor.Unlike other task management applications, it helps the user to create projects and sub-projects effortlessly.
It conveniently integrates and organizes all your projects effortlessly the way you like.
Refer link to run scripts on daily basis in Mac OS. And using Automator you can schedule tasks on daily basis and link the task with recurring calendar event to run scripts on specified time daily.