12-inch (Diagonal) LED-backlit with IPS Technology Retina Display, 2304 x 1440 pixels (~226ppi pixel density), 16:10 aspect ratio
MacOS Sierra, Chipset: Intel Core m5, Processor: Dual-Core 1.2 GHz (with Turbo Boost Up to 2.7 GHz), Graphics: Intel HD Graphics 515; Dual display and video mirroring: simultaneously supports full native resolution on the built-in display and up to 3840 by 2160 pixels at 30Hz on an external display, both at millions of colors.
Internal Memory: 512GB, 8GB RAM of 1866MHz LPDDR3 onboard memory

13.3in Widescreen TFT LED Backlit Display, 1440 x 900 pixel native resolution
500 GB SSD
8 GB LPDDR3 SDRAM