Apple has released iMovie 10.0.1, which now enables the video editing app to be installed on some Macs with older video processing cards. The recently released iMovie 10.0 (see “New Free iLife and iWork Apps Share across Devices and Platforms,” 22 October 2013) required an OpenCL-capable video card when it was launched. iMovie 10.0.1 revises that requirement to include some older video cards — but Apple doesn’t specify which video cards may be compliant. The update also fixes a bug that caused iMovie to quit unexpectedly or stop responding when updating projects and events from previous versions of iMovie. ($14.99 new from the Mac App Store, free update, 1.94 GB)
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-]).