Your MacBook Pro with Retina display comes with 90 days of free telephone support and a one-year limited warranty. OS X Mavericks: Easy to use, incredibly powerful, and packed with features you’ll love, OS X Mavericks is the world’s most advanced desktop operating system.
Dual display and video mirroring: Simultaneously supports full native resolution on the built-in display and up to 2560 by 1600 pixels on up to two external displays, both at millions of colors.
Retina display: 15.4-inch (diagonal) LED-backlit display with IPS technology 2880-by-1800 resolution at 220 pixels per inch with support for millions of colors.