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.
How to force an app to quit
Apps won't work in macOS Catalina One of the most controversial changes included with macOS Catalina is the fact that it no longer supports 32-bit apps. This means any apps that don't have a 64. I backed up my iPhone 6s Plus to my brand new iMac and wanted to import my photos from phone to photo app on iMac. It stopped mid way saying it quit unexpectedly. So I did some research and repaired my library and tried to import the photos onto my iMac again to fire up some space on my phone and it quit again just like it did the other couple. Google's Backup and Sync app. Google's Backup and Sync app for Windows or Mac will back up photos from your computer, camera or SD card to Google Drive and Photos, and the app will upload a copy.
![Mac Mac](/uploads/1/3/4/1/134139924/289443423.webp)
Press these three keys together: Option, Command, and Esc (Escape). Or choose Force Quit from the Apple menu in the upper-left 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.
Apps Won't Force Quit Mac
![My Photos App Won My Photos App Won](/uploads/1/3/4/1/134139924/167391956.gif)
You can even force the Finder to quit, if it stops responding: Select Finder in the Force Quit window, then click Relaunch.
Learn more
My Photos App Won't Quit On Mac Computer
How to force an app to close on your iPhone, iPad, or iPod touch.