Stairways Software has released Keyboard Maestro 6.4 with support for reading and modifying file tags in OS X 10.9 Mavericks. Amongst the update’s more than 50 changes, the automation utility also improves accessibility and VoiceOver support, adds asynchronous options for executing scripts and sub-macros, adds several new AppleScript commands, plugs a memory leak in the image finding code, and fixes a number of potential crashes. ($36 new with a 20 percent discount for TidBITS members, free update, 24.4 MB, release notes)
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Use Shift to Compare Edits in iPhoto '08
In iPhoto '08, while you're editing a photo, press the Shift key to see a "before" view; let it up to see the "after" view. It's much faster and easier than using Undo and Redo.