9 PALLETS Apple refers to these "pre-Retina" systems as the Late 2008, Early 2009, Mid-2009, Mid-2010, Early 2011, Late 2011, and Mid-2012 Pro models. Regardless of the year, all 13-Inch models share model number A1278, all 15-Inch models share model number A1286, and all 17-Inch models share model number A1297. MUST GO SEND OFFER NOW!