OS X comes with a built-in application called Activity Monitor, which gives you a general overview of what your MacBook is doing. Running the Activity Monitor app is useful if you want to see how hard your CPU is running or which business applications are consuming lots of memory.
Moreover, you can also use the Activity Monitor to forcibly quit any processes running in the background in order to free up memory or stabilize your system if the process is causing problems.
- Click the “Finder” on your dock to open a Finder window.
- Click “Applications” on the sidebar of the Finder window to see your Mac applications. In this folder, double-click the “Utilities” folder.
- Double-click the “Activity Monitor” icon to access the application.