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.
The MacBook is a line of Macintosh portable computers introduced in March 2015 by Apple Inc. The MacBook has a similar appearance to the MacBook Air, but is thinner and lighter, and is available in space grey, silver, gold, and rose gold.