The thinner chassis also prevented this design from including an optical drive. Other changes include a thinner MagSafe charging connector (dubbed MagSafe 2) that is incompatible with previous charging cables, soldered and therefore non-upgradable memory, and a glued down battery. This new Retina Display MacBook Pro featured a thinner body, a higher resolution screen with a thinner bezel, and an HDMI port. In 2012, Apple made the first significant change to the design of the 13” MacBook Pro with the release of Retina Display. Along with these changes, they also included an SD card slot, Firewire 800 port, and improved screen.

This new MacBook Pro would also feature an aluminum unibody, and would move from the previous user-removable battery design to one that was located underneath the bottom case. Previously, Apple had only offered the Pro model in 15 and 17 inch varieties starting in 2006, but decided to upgrade and rebrand the white, polycarbonate 13 inch MacBook to offer a smaller model in the Pro lineup. Apple's first 13' MacBook Pro was an aluminum unibody laptop released in mid 2009.

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