Is it possible to maximize a Finder window without third-party software? How can I maximize a window in Finder without using third-party software? I read this post but none of these tricks seemed to work.
Move the mouse to the corner of the window where it becomes a resizing arrow and option double-click to fill the screen.
A double-click on any side or corner will move that side/corner to the edge of the screen. Adding option will affect the opposite side as well.