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

Mac does not have a program called Task Manager — that is a Windows tool. Instead, the Mac version is Activity Monitor, which does the same job: it shows you what programs are running, how much memory and processing power each one is using, and lets you force-quit anything that has frozen or is misbehaving.

The fastest way to open it is to press Command + Space to open Spotlight Search, type "activity monitor", and press Enter. The program opens in seconds.

If you prefer using the menu, you can also open Activity Monitor by going to Applications > Utilities > Activity Monitor, though this takes more steps.

Key Takeaways

  • Activity Monitor is the Mac equivalent of Windows Task Manager and shows CPU, memory, and disk usage for each running program.
  • The quickest way to open it is Command + Space, then type "activity monitor" and press Enter.
  • You can force-quit a frozen program by selecting it in Activity Monitor and clicking the X button in the toolbar.
  • The Memory tab shows which programs are using the most RAM; the CPU tab shows which are using the most processor power.

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. If one program shows 80% or higher, that is why your Mac feels slow. The Memory tab shows how much RAM each program is using; if your total memory pressure is in the yellow or red zone at the bottom, your Mac is running out of space to work.

The Energy tab shows which programs are draining your battery fastest — useful if you are on a laptop and wondering why it dies quickly. The Disk tab shows which programs are reading from or writing to your hard drive the most. The Network tab shows which programs are sending or receiving data over the internet.

Most of the time, you only need the CPU and Memory tabs. Start there if your Mac is slow or a program is not responding.

How to force-quit a frozen program

If a program stops responding and you cannot close it normally, find it in Activity Monitor, click on it once to select it, then click the X button labeled "Force Quit" in the toolbar at the top of the window. A dialog box appears asking you to confirm — click "Force Quit" again.

The program closes immediately, though you will lose any unsaved work in that program. This is safe to do; force-quitting does not damage your Mac or other programs.

If you cannot find the program in the list, try typing its name in the search box at the top right of the Activity Monitor window. Some programs run under a different name than what appears in your Applications folder.

Understanding the numbers in Activity Monitor

The % CPU column shows what percentage of your processor each program is using right now. If a program shows 0%, it is running but not actively doing anything at this moment. Anything above 50% is using a lot of power; above 80% means your Mac will feel slow because other programs cannot get processor time.

The Memory column shows how much RAM each program is using, measured in megabytes (MB) or gigabytes (GB). A typical web browser uses 500 MB to 2 GB depending on how many tabs you have open. If one program is using more than half your total RAM, that is usually the problem if your Mac is slow.

At the bottom of the Memory tab, you see a line showing "Memory Pressure" with a colored bar. Green means your Mac has plenty of free memory. Yellow means it is getting full but still working normally. Red means your Mac is out of memory and will be very slow — you should close some programs or restart.

Why your Mac might be slow according to Activity Monitor

If Activity Monitor shows one program using 90% of your CPU, that program is the problem — close it or restart your Mac. If CPU usage is spread across many programs and none is above 50%, your Mac is just busy; wait a few minutes or close programs you are not using.

If Memory Pressure is in the yellow or red zone, your Mac does not have enough RAM for what you are trying to do. Close web browser tabs, close programs you are not using, or restart your Mac to clear memory. If this happens every day, your Mac may need more RAM installed, though that is a hardware upgrade.

If the Disk tab shows one program constantly reading or writing, that program is slow because it is waiting for the hard drive. This is normal during backups, software updates, or when copying large files. If it happens during normal use, the program may have a problem.

Other ways to open Activity Monitor if Spotlight does not work

If Spotlight Search is not responding, you can open Activity Monitor through Finder. Click the Finder icon in your dock, then click "Applications" in the sidebar. Double-click the "Utilities" folder, then double-click "Activity Monitor".

You can also use Launchpad: click the Launchpad icon in your dock (it looks like a grid of dots), then search for "activity monitor" in the search box that appears.

Frequently Asked Questions

Can I restart my Mac from Activity Monitor?

No, Activity Monitor only shows running programs and lets you close them. To restart your Mac, click the Apple menu in the top left corner and select "Restart". Activity Monitor cannot restart your Mac directly.

What does "Not Responding" mean next to a program name?

It means the program has frozen and is not accepting commands. You can force-quit it using the X button. The program will close, and you can reopen it. If it keeps freezing, the program may have a bug or your Mac may not have enough memory to run it.

Is it safe to close programs I do not recognize in Activity Monitor?

Some programs with unfamiliar names are system processes that keep your Mac running — closing them can cause problems. If you do not recognize a program, search for its name online before closing it. Programs you installed yourself are safe to close if they are not responding.

Why does Activity Monitor show more memory used than my Mac has?

macOS uses a technique called memory compression to fit more data into RAM. The numbers you see add up to more than your total RAM because the system is compressing data. This is normal and not a problem — look at Memory Pressure instead to see if your Mac is actually running out of space.

Can I use Activity Monitor to see what websites I have visited?

No. Activity Monitor shows which programs are running and how much power they use, but not what you are doing inside them. It cannot show browsing history, messages, or files you have opened.