Apple A Grade Macbook Pro 15.4-inch (Retina DG) 2.8Ghz Quad Core i7 (Mid 2015) MJLU2LL/A 1TB SSD 16 GB Memory 2880x1800 Display Mac OS X v10.12 Sierra Power Adapter Included

Macbook Pro 15.4 -inch (Retina DG) 2.5G hz Quad Core i7 (Mid 2015). - Apple MJLU2LL/A. The MacBook Pro "Core i7" 2.8 15-Inch (Dual Graphics/Force Touch - Mid-2015 Retina Display) features a 22 nm "Haswell/Crystalwell" 2.8 GHz Intel "Core i7" processor (4980HQ), with four independent processor "cores" on a single silicon chip, a 6 MB shared level 3 cache, 16 GB of onboard 1600 MHz DDR3L SDRAM (which cannot be upgraded later), 512 GB or 1 TB of PCIe-based flash storage, and dual graphics processors -- an AMD Radeon R9 M370X with 2 GB of dedicated GDDR5 memory and an integrated Intel Iris 5200 Pro graphics processor with 128 MB of "Crystalwell" embedded DRAM (and shared system memory).

It also has an integrated 720p FaceTime HD webcam and a high-resolution LED-backlit 15.4" widescreen 2880x1800 (220 ppi) "Retina" display in a case that weighs just less than 4.5 pounds ( 2.04 kg). It does not have an internal optical drive.