MacBookPro9,: MD104LL/A (2.7 GHz Core i7) MacBookPro9,: MD104LL/A (2.6 GHz Core i7) MacBookPro9,: MD103LL/A (2.3 GHz Core i7) MacBookPro9,: MD102LL/A (2.9 GHz Core i7) MacBookPro9,: MD101LL/A (2.5 GHz Core i5) Voltage: 1.35V (Supports operation at 1.5V) Apple MacBook Pro 13 inch A1278 – Mid 2012. Most sadly, these 'Retina' models are virtually sealed and not upgradeable in any way.Ports and connectivity come via 3-stream AirPort Extreme (802.11a/b/g/n), Bluetooth 4.0, 2 USB 3.0 ports, 2 Thunderbolt ports, 1 HDMI port, 1 audio in/out port plus 1 SDXC card slot.4GB Memory (PC3L-12800, DDR3 1600MHz) for Apple MacBook Pro 15 inch A12. Similar to the Air models, Apple has phased out any internal optical drive.

It also has a backlit keyboard, a 'no button' glass multi-touch trackpad along with a claimed 7 hour battery.

This 4.5 lb (2.02 kg) model is housed in an extra lean aluminum case, featuring a 2x1800 15' 'retina' high-res LED widescreen display. This BTO 'Build to Order' model MacBook Pro 'Core i7' 2.7 15' (Mid-2012 Retina Display) is powered by a 22 nm Ivy Bridge 2.7GHz Intel 'Core i7' processor (3820QM), quad core chip with 8MB level 3 cache, 8GB of (non-upgradeable) onboard DDR3-1600 (PC3-12800) SDRAM, 256GB or 512GB of flash storage plus two graphics processors including a NVIDIA GeForce GT 650M with 1GB of GDDR5 RAM as well as an Intel HD Graphics 4000 (shared memory) graphics processor, plus a 720p FaceTime HD webcam.

Ram for 2012 macbook pro 15