If you suspect an issue with the MacBook Air hardware, you can use the Apple Hardware Test application to help determine if there's an issue with one of the computer's components, such as the memory or processor....
Reinstalling software using Remote Install Mac OS X v10.5 and v10.6
Learn how to reinstall software on your MacBook Air or Mac mini with Remote Install Mac OS X or Mac OS X Server....
iMac (Late 2009) and iMac (Mid 2010): External features, ports, and connectors
Learn about the external features, ports, and connectors on the iMac (Mid 2010) and iMac (Late 2009) computers. All ports and connectors described in this document are located on the Input/Output (I/O) panel on the bottom-right side on the back of the computer.
...
Motion 5: About Motion Supplemental Content
The Motion Supplemental Content adds content for use in Motion 5. It is available via Software Update if Motion 5 is installed on your computer or via Apple Support Downloads....
Logic Express 9: Support Resources
Use the resources below to help get support and find answers to your Logic Express 9 questions....
Logic Studio (2009): Support resources
Use the resources below to help get support and find answers to your Logic Studio (2009) questions....
Click the mouse button to re-establish a connection to your Apple wireless mouse or trackpad
If your computer stops recognizing your Apple wireless mouse or wireless trackpad, simply click the mouse button or trackpad surface to get it working again....
iMovie '11: How to import a project created with iMovie on iPad, iPhone, or iPod touch
With iMovie '11 (v9.0.4 and later) on your Mac, you can import an iMovie for iOS project from your iOS device to your computer....
MobileMe: Events created in iCal may revert to New Event title at me.com/calendar and on iOS devices
Some events you create in iCal may revert to the generic "New Event" title when you view them at me.com/calendar and on the calendar app on iOS devices. This can be caused by slower internet connections when consecutive edits are made, before iCal has had a chance to finish syncing the changes with MobileMe....
Apple Portables: Determining Battery Cycle Count
For computers with Mac OS X v10.4.x or later, use the steps in this article to determine the cycles on your Apple portable computer's battery....