The MacBook Pro 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 Core central processing units as opposed to the PowerPC G4 chips used in the model it replaced.
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