Opening Activity Monitor from Spotlight Search

The fastest way to open Activity Monitor is through Spotlight Search, the search tool built into every Mac. Press Command + Space on your keyboard, type "activity monitor" into the search box that appears, and press Enter. Activity Monitor opens when ready.

Spotlight appears in the top right corner of your screen and searches your Mac's applications and files. Because Activity Monitor is a standard Mac process, it shows up as the first result almost every time. This method works the same way on any recent version of macOS.

Key Takeaways

  • Press Command + Space, type "activity monitor", and press Enter to open it in seconds.
  • Activity Monitor shows you which programs are using your processor, memory, disk, and network resources right now.
  • The Memory tab tells you if your Mac is running out of RAM; the CPU tab shows which apps are slowing things down.
  • You can force-quit a frozen or stuck process by selecting it and clicking the stop button in the toolbar.

Opening Activity Monitor from the Applications Folder

If Spotlight Search is not working or you prefer to browse manually, you can find Activity Monitor in your Applications folder. Open Finder, click Applications in the sidebar, scroll down to find Utilities, and double-click the Utilities folder. Activity Monitor is inside.

This route takes longer than Spotlight but works if you want to see what else is in the Utilities folder or if you prefer navigating by folder. The Utilities folder contains other system tools like Console, Disk Utility, and System Information — all programs that show you how your Mac is running.

Understanding the Five Main Tabs

When Activity Monitor opens, you see five tabs across the top: All Processes, CPU, Memory, Energy, and Disk. Each tab shows different information about what your Mac is doing right now. The All Processes tab shows everything at once, but the other tabs focus on one type of resource.

The CPU tab shows which programs are using your processor most heavily. If your Mac feels slow, look here first — the app at the top is using the most processing power. The Memory tab shows how much RAM each program is using; if your Mac is sluggish and you see "Memory Pressure" in the red, your Mac is running out of RAM. The Energy tab shows which apps are draining your battery fastest on a laptop. The Disk tab shows which programs are reading from or writing to your hard drive the most.

Finding Out Why Your Mac Is Slow

If your Mac feels sluggish, open Activity Monitor and click the CPU tab. Look at the % CPU column — the apps listed at the top are using the most processor power. If one app is using 80 percent or more, that app is the problem. Close it or restart your Mac to free up that power.

If the CPU numbers look normal but your Mac still feels slow, click the Memory tab instead. Look at the Memory Pressure graph at the bottom of the window. If it is yellow or red, your Mac does not have enough free RAM. Close some programs or restart your Mac. If Memory Pressure stays green even when many apps are open, your Mac has enough memory and the slowness is coming from something else — possibly your hard drive or internet connection.

Force-Quitting a Frozen process

When a program stops responding and you cannot close it normally, Activity Monitor can force it to shut down. Find the frozen app in the list, click it once to select it, then click the stop button (a circle with a line through it) in the toolbar at the top. A dialog box asks if you want to force quit — click Force Quit to confirm.

Force-quitting closes the app when ready without saving any unsaved work in that program, so use it only when the app is truly stuck. After you force-quit, you can reopen the app normally. If the same app freezes repeatedly, the problem is with that app, not your Mac — consider restarting your Mac or reinstalling the app.

Reading the Columns and Numbers

Activity Monitor shows many columns of information, and most of them you do not need to understand. The important ones are % CPU (how much processor power the app is using right now), Memory (how much RAM the app is using), and Threads (how many separate tasks the app is running). You can ignore columns like User, PID, and PPID unless you are troubleshooting a specific technical problem.

The numbers change constantly as your Mac runs. If you want to focus on one app, click its name once to select it, and the numbers for that app stay highlighted. If you want to sort by CPU usage, click the % CPU column header — the list reorders so the heaviest users appear at the top.

Frequently Asked Questions

What does "Not Responding" mean in Activity Monitor?

It means the app is frozen and not reacting to your clicks or keyboard input. You can force-quit it by selecting it and clicking the stop button. The app will close when ready, and you can reopen it afterward.

Is it safe to force-quit apps I do not recognize?

Yes, but do it one at a time. If you force-quit something important to your Mac's operation, you might need to restart. Apps with names like "kernel_task" or "WindowServer" are part of macOS itself — leave those alone. Apps with normal names like "Chrome" or "Slack" are safe to force-quit.

Why does Activity Monitor show so many processes I did not open?

macOS runs many background processes you never see — they handle things like indexing files, checking email, and managing your network. This is normal. You only need to worry about processes if your Mac is slow or one is using an unusually high percentage of CPU.

Can I close Activity Monitor while it is running?

Yes. Activity Monitor is just another app. Closing it does not affect any of the processes it was showing — they keep running. You can reopen Activity Monitor anytime to check on them again.