I have gotten back to learning chess, and I started using the chess game program on my 2015 MacBook Pro. Last night I wanted to castle, but it would not allow me to do so. I was white by the way. Later on, I saw that black was allowed to castle.
Is there some reason why the MacBook Pro Chess game program does not allow for castling? Or is there a rule about castling as white I am yet to learn?
I moved my King over to the Rook - nothing. I then moved my Rook over to the King, again nothing. The pieces went back to their original place.