Apple refreshes entire Retina MacBook Pro lineup with improved processors and more RAM standard

As expected, Apple has pushed out an upgrade to the Retina MacBook Pro lineup. Both the 15-inch and 13-inch models were updated, and two models received price drops. Each 15-inch model received a modest processor speed bump, starting with a new 2.2 GHz chip in the base model, followed by 2.5 GHz in …