I have tried to import a .jpg of my house floor plan. The latest attempt is still running, after 12 hours, and all that is displaying is the Background image wizard window with a little clock icon in the middle of it and the "Go back" and "Continue" buttons are greyed out.

I downloaded and installed XQuartz - as the replacement for X11 - but, to be honest, I'm not sure whether or not I'm supposed to do anything with that other than have it installed and open.