By default, when you reopen an app, any windows that were open when you quit the app reopen. If you prefer, you can have windows close when you quit apps. On your Mac, choose Apple menu System Preferences, then click General. Open General preferences for me. Select “Close windows when quitting an app.”.
To quit (close) a Mac app normally, 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.
Mac Os X 10.13.6
How to force an app to quit
- Press these three keys together: Option, Command, and Esc (Escape). This is similar to pressing Control-Alt-Delete on a PC. Or choose Force Quit from the Apple () menu in the upper-left corner of your screen.
- Select the app in the Force Quit window, then click Force Quit.
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Mac Os 10.13.1 Download
- You can also force the Finder to quit, if it stops responding. Select Finder in the Force Quit window, then click Relaunch.
- If none of your apps are responding, you can force your Mac to restart.
- You can also force an app to close on your iPhone, iPad, or iPod touch.