Apple MacBook Air (11-inch, Mid 2011) - Manual (Page 49)

49 Chapter 3 Problem, Meet Solution
 Check the Wi-Fi status icon (Z) in the menu bar. Up to four bars appear, indicating
signal strength. If signal strength is low, try changing your location.
 Get help online by choosing Help > Help Center, and then searching for “wi-fi”. Also
see the instructions that came with the wireless device for more information.
Keeping Your Software Up to Date
You can connect to the Internet and automatically download and install the latest
free software versions, drivers, and other enhancements from Apple.
When you’re connected to the Internet, Software Update checks to see if any updates
are available. You can set your MacBook Air to check for updates periodically, and
download and install updated software.
To check for updated software:
1 Choose Apple () > System Preferences.
2 Click the Software Update icon and follow the onscreen instructions.
 For more information, search for “Software Update” in Help Center.
 For the latest information about Mac OS X, go to www.apple.com/macosx.
You’ll also get notices from the Mac App Store when application updates are available.
A small number indicating the number of updates appears on the right edge of the
App Store icon. You can update one or more applications at a time.