When you click on a MacBook model on the Apple website the picture of the MacBook at the top of the screen looks interesting. It appears that the dock is at the top of the screen and there is a command bar of some type at the bottom of the screen. Anyone have any idea what that is all about? Here is a link to the page. http://store.apple.com/1-800-MY-APP...6664003/wo/365fDu1aecMn2CxyNUinzxnmhGx/2.?p=0 Thanks.