How to force-quit apps eating memory on Mac

A frozen spinner, a beachball that won't stop, a Mac that's gone sluggish for no obvious reason. Usually one app is responsible. Force-quitting it is not a last resort: it's a normal, safe thing to do on a Mac, and Apple has built three different ways to do it into the operating system.

Below is each method, when to use it, and the one thing you should know before you start: save your work first if the app is still responsive enough to let you. Force-quitting closes the app immediately with no graceful shutdown, so anything unsaved in that app is gone.

The three ways to force-quit on Mac

Method 1: Cmd+Option+Esc (the quickest way)

Hold Command + Option + Escape at the same time. The Force Quit Applications dialog opens immediately. You'll see a list of every open app. Any app that has frozen will show (not responding) in red next to its name.

Click the app you want to close, then click the Force Quit button in the bottom-right corner. macOS asks you to confirm. Click Force Quit again. Done.

This works even when the app is completely unresponsive, because the dialog is run by the operating system itself, not by the frozen app.

Method 2: Activity Monitor (the most information)

Activity Monitor is a free tool Apple ships with every Mac. It shows every process running on your computer and exactly how much memory and CPU each one is using. It's more powerful than the Force Quit dialog when you want to understand why your Mac is slow, not just stop the obvious offender.

How:

1. Press Command-Space to open Spotlight.
2. Type "Activity Monitor", press Return.
3. Click the Memory tab.
4. Click the Memory column header to sort the list, biggest first.
5. Click the app you want to stop.
6. Click the small octagonal stop-sign button in the top-left of the toolbar.
7. Choose Force Quit.

For a full walkthrough of everything Activity Monitor can tell you, see how to use Activity Monitor on Mac.

Method 3: Right-click the Dock icon (for the app in front of you)

If you know exactly which app you want to stop and it's visible in your Dock, this is the fastest mouse-only method.

Hold the Option key on your keyboard, then right-click (or Control-click) the app's icon in the Dock. The context menu that appears will show Force Quit instead of the usual Quit option. Click it.

Without the Option key, you'll only see Quit, which sends the app a polite signal it can ignore. Holding Option replaces that with Force Quit, which the app cannot ignore.

Which apps are safe to force-quit

Any app you launched yourself is safe to force-quit. The list includes everything in your Applications folder and anything you downloaded from the Mac App Store or the internet:

• Google Chrome, Safari, Firefox
• Slack, Microsoft Teams, Zoom, Discord
• Photoshop, Lightroom, Final Cut Pro, Premiere
• Spotify, Notion, WhatsApp, Telegram
• Word, Excel, Pages, Keynote
• Any other app you remember installing

Force-quitting these is completely safe. The app closes, its memory is released, and your Mac continues as normal. You can relaunch the app immediately if you need it. Many apps (Pages, Keynote, Word, Numbers) also auto-save in the background, so the work you lose may be smaller than you expect. Some apps will even offer to restore unsaved documents when you reopen them.

Which apps you should never force-quit

The risk with Activity Monitor is that it shows everything, including the processes macOS itself depends on to keep running. Force-quitting one of these can freeze or crash your Mac immediately.

Leave these alone, no matter what:

• kernel_task - the core of macOS; terminating it crashes the system
• WindowServer - draws everything you see on screen; quitting it logs you out instantly
• loginwindow - manages your login session
• launchd - starts and stops all other processes; the master process
• mDNSResponder - handles local networking, AirDrop, Bonjour
• Anything with a small memory footprint that you don't recognise

A simple rule: if you didn't install it and it's not in your Applications folder, leave it alone. Stick to force-quitting apps you launched. kernel_task appearing high in the CPU list is normal and is macOS protecting itself from overheating; force-quitting it does not help. See how to free up RAM on Mac for what to do instead.

What to do when force-quit doesn't work

Occasionally an app refuses to die even after you've clicked Force Quit. This is rare, but it happens, usually with apps that have locked a file or a system resource.

Try these in order:

1. Wait 30 seconds. macOS sometimes needs time to clean up a process that's in the middle of writing to disk. The dialog may say "not responding" for a few seconds before the app actually closes.
2. Try Activity Monitor. If the Force Quit dialog failed, open Activity Monitor, find the process, and use the stop-sign button there. Activity Monitor has a more direct line to the process.
3. Restart the Mac. If the app still won't close, Apple menu › Restart. A restart forcibly ends all running processes. It's not a failure; it's just the nuclear option. Your Mac will be fine afterward.

If the same app refuses to force-quit repeatedly, that's worth investigating separately. It may be a bug in the app, a corrupted preference file, or a conflict with another process. Deleting the app's preference file (in ~/Library/Preferences, named something like com.appname.plist) or reinstalling the app usually clears it.

If your Mac freezes completely and the cursor won't move, hold the power button for about five seconds to force a hardware shutdown, then restart. This is the equivalent of unplugging a PC and plugging it back in. It's safe to do occasionally but not a good habit; the culprit is still worth finding. If it happens regularly, see why is my Mac freezing for a full investigation guide.

Apple's own documentation on the topic is at Force quit an app on Mac if you want the official one-page summary.