Press Command option and escape keys on a mac or control alt delete on a pc. Select lightroom in the program list and click Force Quit. Click Force Quit again and Lightroom will now be forced to close.

How do I force quit Lightroom on Mac?

Answer: A: Have you tried Force Quitting? Hold the Option, Command and Escape keys all at the same time and a window will open showing all your active apps. Click Adobe Lightroom and then click Force Quit and it will stop.

How do I restart Lightroom?

Now just hold Shift-Option (on Windows it’s Shift-Alt thanks Rob Sylvan) and restart Lightroom. Keep holding them down and the dialog below will appear. Click “Reset Preferences” and it installs a factory fresh set of preferences for you, and the problems you were having right along with it.