How to Stop Pop Ups on a Mac. This wikiHow teaches you how to configure your internet browser settings to block pop-up windows that appear when you open or close a web page, using a Mac. To identify these programs then to stop them from running in the background to speed up your Mac's running speed. Get to know the ways to do by reading this guide on how to stop programs from running at startup on Mac. This guide can be applied for all macOS (including the latest macOS 10.15 Catalina) and all Mac devices.

Use the setting in the log out or restart dialog

When you log out of your Mac or restart it, deselect ”Reopen windows when logging back in” when prompted.

Or start up in safe mode, then restart normally. This doesn't change the setting, but your Mac forgets any windows that were open the last time you logged out or restarted.

If you deselect this setting and an app continues to open automatically:

The app might be a login item. You can add or remove login items in Users & Groups preferences.
The app might have installed its own startup software. Often this is controlled by a setting within the app. Check the app's preferences or documentation, or contact the app's developer.

Use the setting in General preferences

To prevent apps from remembering the windows they had open, choose Apple menu  > System Preferences, click General, then select ”Close windows when quitting an app.”

How To Get A App To Stop Running Machines

Or press and hold the Shift key while opening an app. This doesn't change the setting, but the app forgets any windows that were open the last time you quit the app.

If these steps don't work for an app, the app might have its own setting for reopening windows. Check the app's preferences or documentation, or contact the app's developer.

To quit (close) a Mac app in the normal fashion, choose Quit from the app's menu in the menu bar or press Command (⌘)-Q. If the app doesn't quit, follow these steps to force the app to quit.

How to force an app to quit

How To Get A App To Stop Running Machine

Press these three keys together: Option, Command and Esc (Escape). Or choose Force Quit from the Apple menu  in the top left-hand corner of your screen. (This is similar to pressing Control-Alt-Delete on a PC.)

Then select the app in the Force Quit window and click Force Quit.

How To Get A App To Stop Running Macbook Pro

You can even force the Finder to quit if it stops responding: select Finder in the Force Quit window, then click Relaunch.

How to get a app to stop running machine

How To Get A App To Stop Running Macbook

Learn more

How to force an app to close on your iPhone, iPad or iPod touch.