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Retina display with 2560-by-1600 resolution on the 13-inch model and 2880-by-1800 resolution on the 15-inch model

Fourth-generation dual-core Intel Core i5 (13-inch model) and quad-core Intel Core i7 (15-inch model) processors

Intel Iris Graphics in the 13-inch model and Intel Iris Pro Graphics or Iris Pro plus NVIDIA GeForce GT 750M graphics with 2GB video memory in the 15-inch model

Up to 9 hours (13-inch model) or 8 hours (15-inch model) of battery life1

Faster flash storage2

802.11ac Wi-Fi

Two Thunderbolt 2 ports for connecting high-performance devices and transferring data at lightning speed

Two USB 3 ports (compatible with USB 2 devices) and HDMI

FaceTime HD camera

Pages, Numbers, Keynote, iPhoto, iMovie, GarageBand included

OS X, the world's most advanced desktop operating system

1 Battery life varies by use and configuration. See www.apple.com/batteries for more information

2 Compared with the previous generation.