MacBook Air 
iOS and OS X: Link your phone number and Apple ID for use with FaceTime and iMessage
Learn how to link your iPhone telephone number to your Apple ID for use with FaceTime and iMessage.
OS X Server: Caching the OS X Yosemite installer
To cache the OS X Yosemite installer, stop and restart the Caching service in OS X Server.
OS X: If the opendirectoryd process CPU utilization is high after updating to OS X v10.9.5
You might see an increase in CPU utilization of the opendirectoryd process on systems bound to Active Directory that are updated to OS X v10.9.5.
OS X versions and builds included with Mac computers
Learn which OS X versions (builds) originally shipped with or are available for your computer.
Set up Exchange ActiveSync on your iPhone, iPad, or iPod touch
When you add your Exchange ActiveSync account, you can sync your Mail, Contacts, Calendars, Reminders, and Notes wirelessly with your iOS device.
Troubleshooting iTunes installation on Mac OS X
If you are having trouble installing iTunes on a Mac OS X computer, here are some things to try.
About QuickTime 7 Pro registration keys (codes)
Find answers to commonly-asked questions about QuickTime 7 Pro registration keys (codes).
Windows OS Managed Client: How to manage iTunes control features
This article explains how to manage iTunes control features.
iPhoto: Sharing libraries among multiple users
Learn how to share a single iPhoto library for editing among multiple users.
Adobe Flash Player updates available for OS X on May 27, 2015
Adobe Flash Player updates address a recently identified Adobe Flash Player web plug-in vulnerability.
