On Oct. 20, 2009, Apple released a MacBook that introduced a new polycarbonate 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. On May 18, 2010, the MacBook was refreshed with an updated processor, a faster graphics card, and
improved battery life.
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