https://www.youtube.com/watch?v=fouPx0OPHd4
Display
Retina display: 15.4-inch (diagonal) LED-backlit display with IPS technology; 2880-by-1800 resolution at 220 pixels per inch with support for millions of colors
Native resolution: 2880 by 1800 pixels (Retina); scaled resolutions: 1920 by 1200, 1680 by 1050, 1280 by 800, and 1024 by 640 pixels
Processor
2.0GHz
2.0GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.2GHz) with 6MB shared L3 cache
Configurable to 2.3GHz quad-core Intel Core i7 (Turbo Boost up to 3.5GHz) with 6MB shared L3 cache or 2.6GHz quad-core Intel Core i7 (Turbo Boost up to 3.8GHz) with 6MB shared L3 cache.
2.3GHz
2.3GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.5GHz) with 6MB shared L3 cache
Configurable to 2.6GHz quad-core Intel Core i7 (Turbo Boost up to 3.8GHz) with 6MB shared L3 cache.
Memory
8GB of 1600MHz DDR3L onboard memory
Configurable to 16GB.
16GB of 1600MHz DDR3L onboard memory
Storage1
256GB
Configurable to 512GB or 1TB flash storage.
512GB
Configurable to 1TB flash storage.
Size and Weight
Height: 0.71 inch (1.8 cm)
Width: 14.13 inches (35.89 cm)
Depth: 9.73 inches (24.71 cm)
Weight: 4.46 pounds (2.02 kg)2
Graphics and Video Support
Intel Iris Pro Graphics
NVIDIA GeForce GT 750M with 2GB of GDDR5 memory and automatic graphics switching
Dual display and video mirroring: Simultaneously supports full native resolution on the built-in display and up to 2560 by 1600 pixels on up to two external displays, both at millions of colors
Thunderbolt digital video output
Native Mini DisplayPort output
DVI output using Mini DisplayPort to DVI Adapter (sold separately)
VGA output using Mini DisplayPort to VGA Adapter (sold separately)
Dual-link DVI output using Mini DisplayPort to Dual-Link DVI Adapter (sold separately)
HDMI video output
Support for 1080p resolution at up to 60Hz
Support for 3840-by-2160 resolution at 30Hz
Support for 4096-by-2160 resolution at 24Hz
Camera
720p FaceTime HD camera
MagSafe 2 power port
Two Thunderbolt 2 ports (up to 20 Gbps)
Two USB 3 ports (up to 5 Gbps)
HDMI port
Headphone port
SDXC card slot
Apple Thunderbolt to FireWire Adapter (sold separately)
Apple Thunderbolt to Gigabit Ethernet Adapter (sold separately)
Wireless
Wi-Fi
802.11ac Wi-Fi wireless networking;3 IEEE 802.11a/b/g/n compatible
Bluetooth
Bluetooth 4.0 wireless technology
Audio
Stereo speakers
Dual microphones
Headphone port
Support for Apple iPhone headset with remote and microphone
Support for audio line out (digital/analog)
Keyboard and Trackpad
Full-size backlit keyboard with 78 (U.S.) or 79 (ISO) keys, including 12 function keys and 4 arrow keys (inverted "T" arrangement) with ambient light sensor
Multi‑Touch trackpad for precise cursor control; supports inertial scrolling, pinch, rotate, swipe, three‑finger swipe, four‑finger swipe, tap, double‑tap, and drag capabilities
Battery and Power4
Up to 8 hours wireless web
Up to 8 hours iTunes movie playback
Up to 30 days standby time
Built-in 95-watt-hour lithium-polymer battery
85W MagSafe 2 Power Adapter with cable management system; MagSafe 2 power port
Electrical and Operating Requirements
Line voltage: 100V to 240V AC
Frequency: 50Hz to 60Hz
Operating temperature: 50° to 95° F (10° to 35° C)
Storage temperature: –13° to 113° F (–25° to 45° C)
Relative humidity: 0% to 90% noncondensing
Maximum operating altitude: tested up to 10,000 feet
Maximum storage altitude: 15,000 feet
Maximum shipping altitude: 35,000 feet