How to Check the Running Applications on a MacBook

View the Dock for any application icons with indicator lights beneath them. This indicates a currently running application. Click the icon to bring it in front of all other applications.
Press 'Command-Option-Escape' to activate the Force Quit Applications dialog box. This window shows all the currently running applications, and it gives you a way to close an application that has stopped responding by selecting the application and clicking the 'Force Quit' button.
Click the 'Go' menu from the Apple menu bar, select 'Utilities' and choose 'Activity Monitor' to launch the application. Look in the Process Name field in the default CPU tab to view a list of all currently active applications and processes. You can click the various tabs to sort the items by CPU usage, memory usage and other attributes.
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