: Press Command (⌘) + Spacebar , type "Activity Monitor," and hit Enter . This is the fastest method for most users.
To open Activity Monitor with a shortcut, press Command (⌘) + Space on your keyboard, type Activity Monitor, and hit Enter. How to open the Task Manager on Mac and monitor load
: If an app is completely frozen and you just need to kill it, press Command (⌘) + Option (⌥) + Escape (⎋) . This opens a simplified list where you can select and terminate unresponsive applications.