Ian Page has released Mactracker 7.3.3, which adds recent releases for the MacBook Pro (see “Apple Upgrades 2014 MacBook Pro CPUs and RAM, Lowers Prices,” 29 July 2014) and 21.5-inch iMac (see “Apple Introduces Entry-Level iMac for $1,099,” 18 June 2014). The popular encyclopedia of Apple products gains details about the latest OS X and iOS releases, the 16 GB configuration of the iPod touch (5th generation), and the Apple Lisa and Apple Lisa 2. It also updates Support Status for Apple’s latest Vintage and Obsolete products. (Free from Mactracker Web site or Mac App Store, 34.6 MB, release notes)
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-]).