Apple has released MacBook Air Flash Storage Firmware Update 1.0 for MacBook Air models released in the middle of 2012. The release addresses a rare problem that could cause a system to fail to recover from a crash. As always with firmware updates, we recommend relying on Software Update or the App Store app to ensure you get the firmware update for your specific model, and being careful not to interrupt the update process. Apple also notes that your MacBook Air will shut down after the update is complete, and that you should wait one whole minute before restarting it. (Free, 1.69 MB)
Instant Full-Screen Slideshow
For an instant full-screen slideshow of a bunch of pictures, select them in the Finder, and press Command-Option-Y. (This is the same as pressing the Space bar, clicking the full-screen button in the Quick Look toolbar, and clicking the play button.)
MacBook Air Flash Storage Firmware Update 1.0
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As an aside, I tried to find the history of updates as I would have in the "old days" (e.g., Lion and earlier) when another tab in software update would reveal each one going back a long way, perhaps to the last (maybe only) "clean install."