How to force quit the "Force Quit Applications" window

The "Force Quit Applications" window opened spontaneously due to memory pressure.

Now I can't close the "Force Quit Applications" window itself . The "X" button doesn't close the window and it doesn't have an icon in the dock or a menu bar.

Solution 1:

You can close it with ⌘ cmd+w.

There's a list of the official keyboard shortcuts on apple.com

Solution 2:

⌘ cmdW was not working for me either.

I had luck by opening the "normal" Force Quit window from Apple menu  > Force Quit…, which replaced the out-of-memory Force Quit window. I was then able to close it normally with the X button.