Since half of the people buying a Mac is new to Mac, it's safe to say many of them use an iDevice before they use a Mac. It makes sense to give them something f

Since half of the people buying a Mac is new to Mac, it's safe to say many of them use an iDevice before they use a Mac. It makes sense to give them something familiar by copying some UI elements, especially for things like Calendar when the desktop experience does not need to be different from the mobile experience.