Where can I find a task manager in Mac OS X Lion? I want to see the processes that are currently being run, and I can kill any process I like.
There are many ways to find mac task manager. Easiest one is to use spotlight. Just type Activity monitor i.e mac task manager.
If you wish to just force quit an app or process. You can just use this shortcut: Alt + Command (⌘) + Esc
Source: Mac Activity Monitor