MacBook

MacBook.

               

Is a line of Macintosh portable computers introduced in January 2006 by Apple Inc. It replaced the PowerBook G4 and was the second model to be announced in the Apple–Intel transition (after the iMac). Positioned at the high end of the MacBook family, the MacBook Pro is currently produced in three sizes: the 13-, 15-, and 17- inch. There have been two designs for the MacBook Pro, both using aluminum. The first design was largely a carry-over from the PowerBook G4 and used the Intel Corecentral processing units as opposed to the PowerPC G4 chips used in the model it replaced. It was first released as a 15-inch model in January 2006, followed by a 17-inch model in April of the same year. These original models received several updates and were upgraded with Core 2 Duo processors in late 2006. The second "unibody" model has a more tapered design with most of the casing made from a single block of aluminum. This design was introduced with the 15-inch MacBook Pro in October 2008, along with the 13-inch aluminum unibody MacBook. The 17-inch model was updated with the same design the following January, also introducing the built-in battery that was later used in the rest of the MacBook Pro line from June 2009. Subsequent updates brought upgraded Intel Core i5 and i7processors and introduced Intel's Thunderbolt technology.

Discrete.

               

The original 15-inch MacBook Pro was announced on January 10, 2006 by Steve Jobs at theMacworld Conference & Expo. The 17-inch model was later unveiled on April 24, 2006. The first design was largely a carryover from the PowerBook G4 and utilized Intel Core CPUs as opposed to the PowerPC G4 chips used by its predecessor. It is 0.1 inches (0.25 cm) deeper, 0.4 inches (1.0 cm) wider, and 0.1 inches (0.25 cm) thinner than the 15-inch aluminum PowerBook G4, while weighing the same. Other changes from the PowerBook include a built-in iSightwebcam and the inclusion of MagSafe, a magnetic power connector designed to detach easily when pulled to prevent the entire laptop from being pulled off a surface. Both features were later brought over to the MacBook. In order to accommodate the slimmer form factor of the MacBook Pro, the speed of the optical drive was halved compared to that of the PowerBook G4 and dual layer DVD writing support was omitted. 

Both the original 15- and 17-inch discrete model MacBook Pros come with ExpressCard/34 slots, which replace the PC Card slots found in the PowerBook G4. All discrete 15-inch models have twoUSB 2.0 ports and one FireWire 400 port, while the 17-inch models have three USB 2.0 ports as well as one FireWire 400 port. When first introduced, the MacBook Pro did not come with FireWire 800 or S-Video ports, although FireWire 800 was added in the next 15-inch model revision and was present in every version of the 17-inch design. S-Video capability can be attained through the use of a DVI to S-Video adapter. External displays with up to a 2,560 × 1,600 pixel resolution are supported through a dual-link DVI port. All models include a built-in Gigabit Ethernet port, Bluetooth 2.0, and 802.11a/b/g. Later models include support for the draft 2.0 specification of 802.11n and Bluetooth 2.1