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Force quitting an app on macOS is as simple as using the shortcut Option+Command+Escape, which will in turn bring up the Force Quit Menu.

To force quit the app, simply select it from the list and press ‘Force Quit’. This will in turn bring up a dialog box.

If you’re certain that you want to quit the app, then press ‘Force Quit’ and the app should close. You can then reopen it and simply carry on using the app.

If you can’t access the Force Quit menu for whatever reason, then Apple also allows you to force stop applications through the Activity Monitor. This lists all of your Mac’s active processes in a similar vein to Task Manager on Windows.

To gain access to Activity Monitor, go into Launchpad and search for the app, and click on it.

Once you open it, you’ll be greeted with a long list of processes. The chances are the app may be stressing part of your system by not responding, so if you need to, you can click on the ‘% CPU’ heading which should place the most demanding app at the top of the list.

To force quit the app, simply select it within the list and click to the ‘X’ icon at the top of Activity Monitor. You’ll then be greeted by a dialog box where you can confirm your decision to force quit.