The MacBook Air is a line of Macintosh ultraportable notebook computers from Apple Inc. The Air is a very light and thin structure and it's available in two sizes: 13.3-inch and 11.6-inch. MacBook Air sits below the thicker and higher-performance MacBook Pro in the Macintosh product line; MacBook Air has become Apple's entry-level laptop due to the discontinuation of the white MacBook as well as lower prices on subsequent iterations of the MacBook Air. In recent years the MacBook Air has become the best-selling Macintosh computer and the best-selling ultraportable laptop credited with revolutionizing lightweight yet powerful laptops known as Ultrabooks.

Features
1- Up to 12 hours of battery life
The 11-inch MacBook Air lasts up to 9 hours between charges and the 13-inch model lasts up to the incredible 12 hours. That's the difference between a notebook that only has the features of being thin and light and one that has much more power.
2- Thin, light, and powerful
Fourth-generation Intel Core processors with Intel HD Graphics 5000 are up to whatever the task. From editing photos to browsing the web, everything happens ultrafast while uses less energy. And all that power is encased in an incredibly thin 0.68-inch unibody design that weighs only 2.38 pounds.
3- 802.11 ac Wi-Fi support
With the latest 802.11ac technology, MacBook Air takes Wi-Fi speeds over the top. Connect to an 802.11ac base station and experience wireless performance up to 3x faster than the previous generation of Wi-Fi. 802.11ac also delivers expanded range, which enables you to work more freely than ever.
4- Fast all-flash storage
Flash storage in MacBook Air is up to 9x faster than a 5400-rpm notebook hard drive. So everything you do is snappy and responsive. MacBook Air also wakes up fast thanks to flash storage and fourth-generation Intel Core processors.
5- Powerful apps included
iPhoto, iMovie, GarageBand, Pages, Numbers, and Keynote, all are equipped on every new Mac; you also get great apps for email, sur¬ng the web, sending texts, making FaceTime calls and find new apps with a finding app.
6- OS X Mavericks
OS X makes Mac works better. It features an amazing collection of apps you'll use every day, including advanced technologies that boost performance and battery life. And iCloud makes your Mac, iPhone, iPad, and iPod touch work wonderfully together.

Tech specs
Model: 11-inch MacBook Air

Display:
11.6-inch (diagonal) LED-backlit glossy widescreen display with support for millions of colors; Supported resolutions:1366 by 768 (native), 1344 by 756, and 1280 by 720 pixels at 16:9 aspect ratio; 1152 by 720 and 1024 by 640 pixels at 16:10 aspect ratio; 1024 by 768 and 800 by 600 pixels at 4:3 aspect ratio
Price:
$899 / $1099
Processor:
1.4GHz dual-core Intel Core i5 (Turbo Boost up to 2.7GHz) with 3MB shared L3 cache
Configurable to 1.7GHz dual-core Intel Core i7 (Turbo Boost up to 3.3GHz) with 4MB shared L3 cache.
Memory:
4GB of 1600MHz LPDDR3 onboard memory
Configurable to 8GB.
Storage:
128GB PCIe-based flash storage / 256GB
Operating system:
OS X Mavericks: Easy to use and incredibly powerful, it's the world's most advanced operating system for desktop.

Model: 13-inch MacBook Air

Display:
13.3-inch (diagonal) LED-backlit glossy widescreen display with support for millions of colors
Supported resolutions:
1440 by 900 (native), 1280 by 800, 1152 by 720, and 1024 by 640 pixels at 16:10 aspect ratio and 1024 by 768 and 800 by 600 pixels at 4:3 aspect ratio
Price:
$999 / $1199
Processor:
1.4GHz dual-core Intel Core i5 (Turbo Boost up to 2.7GHz) with 3MB shared L3 cache
Configurable to 1.7GHz dual-core Intel Core i7 (Turbo Boost up to 3.3GHz) with 4MB shared L3 cache.
Memory:
4GB of 1600MHz LPDDR3 onboard memory
Configurable to 8GB.
Storage:
128GB / 256GB
Operating system:
OS X Mavericks: Easy to use and incredibly powerful, it's the world's most advanced operating system for desktop.