Monitors back then were wide then and the Alto turned the screen on its side. The Mac somewhat similarly had a screen that wasn't wide. The Mac mouse is also copied from the Alto's if you look at the shape.
I'm not following you here - the Mac had a wide monitor, standard 4:3 CRT, totally unlike the Alto's portrait display. The Mac's mouse had one button, while the Alto's mouse had three buttons. Both had a rectangular shape, but that's the obvious shape to use (see Engelbart's mouse).