Apple A1278 MacBook Pro 13" Early 2011 2.3 gHz i5 Upgraded in December 2016 with increased RAM and 250 GB SSD SATA drive.One of the RAM slots is loose so it is empty - see picture - the other slot has one 8 GB chip. This repair was completed in 2016 and computer has been working great since then.MacOS High Sierra (10.13.6) installed, reset and will start up at setup screen.Power adapter includedComputer and adapter has scratches and scuff marks from previous use.All keys are functional.Sold as shown.