Unibody Polycarbonate Model
On October 20, 2009, Apple released a MacBook that introduced a new polycarbonate (plastic) unibody design, faster DDR3 memory, a multi-touch trackpad, an LED-backlit display, and a built-in seven hour battery. The polycarbonate unibody MacBook, like its aluminum predecessor, lacks FireWire and, like the 13-inch MacBook Pro, has a combined audio in/out port. There is no infrared port and the Apple Remote is not included. On May 18, 2010, the MacBook was refreshed with a faster processor, a faster graphics card, improved battery life, and the ability to pass audio through the Mini DisplayPort connector. On July 20, 2011, the MacBook was discontinued for consumer purchases, but was still available to educational institutions until February 2012.
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