What do you need Task Manager on Mac for

Most users, after moving from Windows to Mac OS, are wondering how to get Task Manager on Mac?

Well, Activity Monitor is the Task Manager Mac equivalent of Windows and is the most powerful utility for managing applications and processes in the OS X.

It displays not only all running and active applications but also all active and inactive processes.

In other words, Activity Monitor shows almost everything that works on a Mac, including the aforementioned window applications, background applications, menu bar items, system-level processes, other user processes, inactive processes, service daemons — or almost everything that works as a process.

Activity Monitor offers many tools and options, it is the most advanced way to view extended information on all active processes without having to use the Command Line.

The text above is a summary, you can read full article here.