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 15-inch version defaults to 8GB RAM and a 256GB SSD (which Apple cheekily described as a quarter terabyte). Our review configuration of the 15-inch MacBook Pro is the step-up model (and it's a big step) for $2,599, with a faster 2.3GHZ Core i7, 16GB of RAM, a 512GB SSD, and the Nvidia GeForce 750M GPU.