I have been using Snow Leopard with very old MBP and just recently purchased a brand new MBP 13" with Touch Bar. What I used to do with Snow Leopard does not work with Sierra. 1. How can I move an icon (folder icon, or any alias for that matter) by dragging it on the desktop or inside the folder. When I try to drag it, there is a new window pops up for that particular file I am trying to move. 2. How can I just move a file from Mac HD to an external drive? I used to just click a file or whatever and drag it to a new external drive to make a copy. I cannot do this any more. Do I need to press additional key? Sorry about such an elementary question. But, it seems it is quite a jump from Snow Leopard to Sierra.