Although the fifth-generation Intel Core i5 processor and Force Touch trackpad are minor updates, this year's 13-inch Retina Apple MacBook Pro is still an easy top pick for high-end ultraportables.... Read the full review on pcmag.com
Essentially, an Apple ID is your passport to the Apple ecosystem of hardware and software. It is an important information that smooths the interaction between you, your hardware, software and services that Apple provides.
Changes that a user makes to his or her Apple ID account, while he or she is using one Apple product, are also recognized by other applications where the user uses the same Apple Account (for example, the online Apple Store, MobileMe, or iPhoto).