The 13-inch model features quad-core i5 and i7 chips with Turbo Boost speeds up to 4.5GHz, while the 15-incher has six-core i7 and i9 processors that can reach 4.8GHz. The bigger model can also be configured with more elaborate hardware, including up to 32GB of RAM; a 4TB SSD; and dedicated Radeon Pro 560X graphics.
Display: 13.3-inch, 2,560 x 1,600 LED screen with IPS
Processor: 2.3GHz quad-core Intel Core i5
Memory: 8GB ~ 16GB unified memory
Storage: 256GB ~ 2TB SSD
Camera: 720p FaceTime HD webcam