The 13-inch model MacBook is an ultrabook, a low-bulk laptop computer, designed, developed and marketed by Apple Inc. It was released March on 9, 2015.
It runs on OS X El Capitan, has a 13.3-inch (diagonal) LED-backlit glossy widescreen display with support for millions of colors screen with a 1440 x 900 resolution, a 1.6GHz dual-core Intel Core i5 procesor and 8GB of 1600MHz LPDDR3 RAM. More: en.wikipedia.org.