The MacBook Air is a line of notebook computers that are ultraportable and is part of the Macintosh product line, created by Apple Inc. The Air was designed to balance both performance and portability, containing a full-sized keyboard design, a machined casing made of aluminium, and a very light and thin structure. The MacBook Air is available in two sizes, with the length of the diagonal display determining the model size: 13.3-inch and 11.6-inch (or 33.78 cm and 29.46 cm).
A range of model choices with different specifications are produced by Apple, and as of 2013, all Air models use solid-state drive (SSD) storage and Intel Core i5 or i7 central processing units (CPUs). In the Apple product line, the MacBook Air was previously positioned above the white MacBook (discontinued in 2011) and below the thicker and higher-performance MacBook Pro laptop line that remains in production.