I would need advice on something very elementary. My year-old Macbook Pro Retina is very minimal in its connection slots. There is no CD Drive, and no image camera on the lid like there was on my old Macbook. I assume this means I get no image of myself when on Skype. So no point downloading and installing Skype. I have one slot for mains electricity one for the mouse and little else that I understand. I am also unable to install Mavericks, but thats a minor inconvenience, manage OK with snow leopard. Any help appreciated.