Remove Preview window for all Finder windows One day something happened and the Preview window on the right hand side of the window started appearing in all my Finder windows. How can I make it go away permanently? If I close it, it only closes for that one particular folder.
Close all Finder windows except for one.
In the only open Finder window, arrange it in a manner that you'd
like as the default without having the Preview window showing.
Press commandj (⌘J) and then at the bottom of the
View Options sheet, click the Use as Defaults button.