When an app stops responding, force quit is your fastest way out

When a Mac process freezes, becomes unresponsive, or refuses to close normally, force quit terminates it when ready without saving unsaved work. The app closes within seconds, and you can reopen it or move on. Force quit does not harm your Mac — it straightforward stops the frozen process. You have three ways to do it, from fastest to most thorough.

The risk of force quitting is data loss: any work you have not saved in that app will be gone. If the app is still responding, close it normally first (Command+Q or File > Quit). Force quit only when the app truly will not respond to clicks or keyboard commands.

Key Takeaways

  • Command+Option+Esc opens the Force Quit window, where you select the frozen app and click Force Quit — this is the fastest method for most people.
  • Activity Monitor (in Applications > Utilities) shows every running process and lets you force quit from there if the keyboard shortcut does not work.
  • Force quitting does not save your work, so use it only when the app will not respond to normal close commands.
  • After force quitting, restart the app to see if the problem was temporary or if the app needs an update.

The keyboard shortcut: Command+Option+Esc

Press Command+Option+Esc at the same time. A window titled "Force Quit Applications" appears within a second. The window lists every open app; the frozen one is usually marked "(not responding)" in red text.

Click the app name to select it, then click the "Force Quit" button in the bottom right. The app closes when ready. The window stays open so you can force quit another app if needed, or click the red close button in the top left to close the window.

This method works even if your mouse is sluggish or partially frozen, because it relies on keyboard commands. If the keyboard shortcut does not open the window, move to Activity Monitor instead.

Activity Monitor: the backup method

Open Activity Monitor by pressing Command+Space, typing "Activity Monitor", and pressing Enter. The app opens to the Processes tab, showing every running process and background process.

Look for the app you want to close. If it is frozen, it usually shows "(Not Responding)" next to its name. Click it once to select it, then click the "X" button in the top left corner of the window (or press Command+Q). A dialog box asks "Are you sure you want to quit the process?" — click "Force Quit".

Activity Monitor is more powerful than the Force Quit window because it shows background processes and system services, not just visible apps. If an app has spawned multiple processes, you may see several entries with the same name. Force quit the main one first; if the app still will not close, return to Activity Monitor and force quit the others.

When to restart your Mac instead

If multiple apps are frozen or force quit does not work, restart your Mac. Press the power button, hold it for 10 seconds until the screen goes black, then release. Wait 30 seconds and press the power button again to turn it back on.

A restart clears all running processes and often fixes problems that force quitting alone cannot solve. You will lose unsaved work in all open apps, so restart only when force quit has failed or when your Mac is so sluggish that even opening Activity Monitor is difficult.

Why apps freeze and what to do after

Apps freeze for several reasons: a software bug, a corrupted file, insufficient memory, or a conflict with another app or system process. Force quitting stops the when ready problem, but the underlying cause may return.

After force quitting, check whether the app has an available update. Open the App Store, click your profile icon in the top right, and look for the app in the "Updates Available" section. Install the update if one exists. If the app is not from the App Store, open the app itself and look in the menu bar for an option like "Check for Updates".

If the app freezes again after updating, the problem may be specific to your Mac. Try opening the app with fewer other apps running, or restart your Mac and open only that app. If it still freezes, the app may have a compatibility issue with your Mac's operating system version.

Preventing freezes: keeping apps current

The most common reason apps freeze is outdated software. Each update includes bug fixes and performance improvements. Turning on automatic updates ensures you get these fixes without having to remember to check manually.

Go to System Settings > General > Software Update > Automatic Updates. Check the boxes for "Install system data and security updates" and "Install app updates from the App Store". Your Mac will read and install updates in the background, usually overnight.

For apps outside the App Store, open each one and look for a preferences or settings menu. Many have an option to check for updates automatically. If an app freezes repeatedly even after updating, it may be incompatible with your current macOS version — check the app's website or support page to confirm it works with your Mac's operating system.

Frequently Asked Questions

Will force quitting damage my Mac or the app?

No. Force quitting terminates a single process; it does not affect your operating system or other apps. The app itself is not damaged — you can reopen it when ready. The only loss is unsaved work in that app.

What is the difference between force quit and restart?

Force quit closes one frozen app and leaves everything else running. Restart shuts down your entire Mac and turns it back on, clearing all processes. Use force quit first; restart only if force quit does not work or multiple apps are frozen.

Can I force quit an app that is running in the background?

Yes. Open Activity Monitor, find the app by name (even if you do not see its window), select it, and click the X button. Background apps are listed in Activity Monitor just like visible ones.

Why does the same app keep freezing?

Check for an available update first — most freezes are fixed by updates. If the app is current and still freezes, try restarting your Mac and opening only that app to see if another app is causing a conflict. If it still freezes, the app may not be compatible with your macOS version.

Do I lose everything if I force quit?

You lose only unsaved work in the app you force quit. Other open apps and files are not affected. Close apps normally (Command+Q) when possible to save your work; use force quit only when the app will not respond.