The 15-inch MacBook Pro with Retina display brings up the rear. It's equipped with a 2.0 GHz quad-core i7 processor, 8GB RAM and 256GB of SSD storage. It uses Intel Iris Pro integrated graphics. This year, the Retina display model is the only 15-inch model Apple makes
here's a higher-end 15-inch MacBook Pro with Retina display worth mentioning separately - it's the only model that sports a discrete graphics chip. Equipped with a 2.3 GHz quad-core i7 processor, it also includes Nvidia GeForce GT 750 graphics. It's Apple's extreme performer.
ust like other MacBooks, MacBook Pros with Retina display can be configured to order with faster processors or more storage capabilities.