Physical properties are often characterized as intensive and extensive properties. An intensive property does not depend on the size or extent of the system, nor on the amount of matter in the object, while an extensive property shows an additive relationship.
Just as Apple regularly updates its iOS mobile operating system, the company also periodically updates its OS X operating system for its MacBook Pro computers. If you own a MacBook Pro, regularly updating your Apple laptop with the newest operating system is a great way to ensure that your device always has the latest apps, features, and security enhancements.
Review: Apple MacBook Pro With Touch Bar. The new MacBook Pro comes in three flavors: two 13-inch models and a 15-incher. They all have thinner bodies, better screens, and trackpads so big they blot out the sun. And you can buy it in space gray.