Steve Jobs began working on the Apple Lisa in 1978 LISA became the first personal computer sold to the public with a GUI, In 1984, Apple next launched the Macintosh. The Macintosh Portable was Apple's first "portable" Macintosh computer, released in 1989. Apple introduced the PowerBook in 1991. The Macintosh Portable was designed to be just as powerful as a desktop Macintosh, but weighed 7.5 kilograms (17 lb) with a 12-hour battery life. The same year, Apple introduced System 7, a major upgrade to the operating system, which added color to the interface and introduced new networking capabilities.
Mac OS X, based on NeXT's OPENSTEP and BSD Unix was released on March 24, 2001, after several years of development. Aimed at consumers and professionals alike, Mac OS X aimed to combine the stability, reliability and security of Unix with the ease of use afforded by an overhauled user interface. To aid users in migrating from Mac OS 9, the new operating system allowed the use of OS 9 applications through Mac OS X's Classic environment.
On January 10, 2006, the new MacBook Pro and iMac became the first Apple computers to use Intel's Core Duo CPU. By August 7, 2006 Apple had transitioned the entire Mac product line to Intel chips, over one year sooner than announced. The Power Mac, iBook, and PowerBook brands were retired during the transition; the Mac Pro, MacBook, and MacBook Pro became their respective successors.
Apple achieved widespread success with consumer electronics that refer to Apple's iPhone, iPod Touch and iPad that introduced innovations in respective devices: mobile phones, portable music players and personal computers. The business model of offering a store for applications to be purchased was an innovation from a business point of view. Touch screens had