Apple has released a rare Supplemental Update for Mac OS X 10.6.7, exclusively for the most recent edition of the 13-inch MacBook Air. The update addresses an issue that makes the system unresponsive when using iTunes, and Apple recommends it for all applicable MacBook Air users. The Supplemental Update is available via Software Update, or directly from Apple’s Web site. (Free update, 461 KB)
Go Back and Forth Fast in Preview
If you're reading a PDF in Apple's Preview software, and you follow a bookmark or an internal link to move around within the PDF, you can quickly return to where you were by pressing the keyboard shortcut Command-[ (that's Command-Left Bracket). Or, you can choose Go > Back.
The command works iteratively, so you can go back to just the previously viewed page or if you issue the command again, to the page before that, and so on. There's also an equivalent Go > Forward (Command-]).
Mac OS X v10.6.7 Supplemental Update for 13-inch MacBook Air (Late 2010)
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