Apple has begun the process of training its AppleCare staff on OS X Mavericks ahead of an expected late October launch for the updated Mac operating system, reports 9to5Mac.These sources say that training has begun today, and support staff will be required to learn about the operating system’s new features, installation process, and troubleshooting options for at least six hours over the course of the next few weeks. The training is said to be similar in secrecy and style to the iOS 7 and iTunes Radio training, and it has yet to begin for all AppleCare employees. AppleCare advisors will learn the OS X Mavericks materials in small groups in order to prevent info