OS X Server: Changing the service data storage location
In OS X Server (Mountain Lion) and Lion Server v10.7.2 or later, you can store service data in a location other than your startup volume....
How to administer OS X Server remotely using Server App
You can install Server app on an OS X computer in order to administer a remote server....
How to use Migration Assistant to transfer files from another Mac
You can use Migration Assistant in OS X Lion and Mountain Lion to transfer important information, such as user accounts, applications, network and computer settings, and files, from one Mac computer to another via a FireWire cable, ThunderBolt cable, or via an Ethernet or wireless network....
Messages: About registration steps
Messages sometimes need additional information to complete your iMessage registration. Learn what to do if you are prompted to take additional steps during registration....
Mountain Lion: How to set up and maintain a FIPS-enabled system
Learn how to set up and maintain a FIPS-enabled OS X Mountain Lion system....
Mountain Lion: About Gatekeeper
Learn about Gatekeeper in Mountain Lion....
Mac 101: Notification Center
Learn about Notification Center and its options....
OS X Mountain Lion: Prompted for access to contacts when opening an application
Learn about the Mountain Lion feature in which it will ask for access to your contacts when opening certain applications....
Mac 101: Safari 6 in OS X Mountain Lion
Learn about using Safari 6 in Mountain Lion, as well as ways to personalize your browsing experience....
About Location Services in OS X Mountain Lion and Safari 6
Location Services allows applications and websites to gather and use information based on the current location of your computer. You have to give your permission before the application or website can use your location data....