The Mac equivalent is called Activity Monitor, and you open it through Spotlight Search

Task Manager on Windows shows you which programs are using your computer's memory and processing power. On a Mac, the same tool is called Activity Monitor. The fastest way to open it is to press Command + Space to open Spotlight Search, type "Activity Monitor", and press Enter. The window opens in seconds.

If Spotlight Search does not work, you can also navigate to it manually: click the Finder icon in your dock, select Applications from the sidebar, open the Utilities folder, and double-click Activity Monitor. Both routes get you to the same place.

Key Takeaways

  • Press Command + Space, type "Activity Monitor", and press Enter to open the Mac version of Task Manager in one step.
  • Activity Monitor shows you which programs are using your CPU, memory, disk, and network, just like Windows Task Manager does.
  • You can force-quit a frozen program by selecting it in Activity Monitor and clicking the stop button in the toolbar.
  • The Memory tab shows you how much RAM each program is using; the CPU tab shows processor load.

Understanding what each tab in Activity Monitor shows you

When Activity Monitor opens, you see several tabs across the top. The CPU tab shows which programs are using your processor right now and how much of it each one is taking. The Memory tab shows how much RAM each program is using — this is the one to check if your Mac is running slowly or feels sluggish.

The Disk tab shows which programs are reading from or writing to your hard drive. The Network tab shows which programs are sending or receiving data over the internet. Most of the time you only need CPU or Memory, but all four tabs work the same way: the program using the most shows at the top of the list.

How to force-quit a program that is frozen

If a program stops responding and you cannot close it normally, Activity Monitor can force it to shut down. Open Activity Monitor, find the frozen program 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 of the window. A dialog box asks you to confirm — click "Force Quit".

The program closes when ready. You may lose any unsaved work in that program, but it will not harm your Mac. After you force-quit something, it is safe to open it again right away.

Why a program might be using a lot of CPU or memory

If you see one program using 80% or more of your CPU, or using several gigabytes of memory, that program is either working hard on something (like rendering video or processing a large file) or it has a problem. Normal web browsing, email, and document editing should use less than 20% CPU and less than 500 MB of memory.

If a program is stuck at high CPU or memory use and you are not actively using it, force-quit it and restart your Mac. If the same program does it repeatedly, try updating it or reinstalling it. If it happens to many programs at once, your Mac may need more RAM or your hard drive may be full.

The difference between quitting and force-quitting

When you quit a program normally (by pressing Command + Q or clicking the red close button), the program saves your work and shuts down cleanly. When you force-quit through Activity Monitor, the program stops when ready without saving. Use normal quit whenever you can, and force-quit only when the program is frozen and will not respond.

Force-quitting does not damage your Mac. It is the same as holding the power button on an old computer — sometimes necessary, but not something you do every day.

Finding Activity Monitor if Spotlight Search is not working

If Command + Space does not open Spotlight Search, or if Spotlight is not finding Activity Monitor, use the manual route. Click the Finder icon (the blue and white face) in your dock at the bottom of the screen. In the sidebar on the left, click Applications. Scroll down or search for the Utilities folder and open it. Activity Monitor is inside.

You can also drag Activity Monitor to your dock for faster access next time. Right-click it, select Options, then click "Keep in Dock". After that, you can open it by clicking the dock icon instead of using Spotlight.

Frequently Asked Questions

What does "not responding" mean in Activity Monitor?

It means the program is frozen and will not accept clicks or keyboard input. You can still see it on your screen, but it is stuck. Force-quit it and restart the program. If it says "not responding" again right away, the program may have a bug or your Mac may not have enough memory to run it.

Is it safe to force-quit programs?

Yes. Force-quitting stops the program but does not harm your Mac. You will lose any unsaved work in that program, so use normal quit when you can. Force-quit is only for when a program is frozen and will not respond to normal quit commands.

Why is my Mac slow even though no single program shows high CPU use?

Check the Memory tab and look at the total memory used at the bottom of the window. If it is close to your Mac's total RAM (usually 8 GB, 16 GB, or more), your Mac is running out of memory and everything slows down. Restart your Mac to clear memory, or close programs you are not using.

Can I see what a program is doing in Activity Monitor?

Activity Monitor shows you how much CPU, memory, disk, and network each program is using, but not what it is doing. If you want to know why a program is using a lot of resources, check the program's own settings or documentation, or search online for the program name plus "high CPU use".