updated 11:10 pm EDT, Thu October 17, 2013
Update evaluates, possibly fixes, data corruption issue with SSD storage
Apple has released a single-model firmware update for the MacBook Air. The new update, the "MacBook Air Flash Storage Firmware Update 1.1" applies only to the mid-2012 MacBook Air line, and allegedly fixes a rare issue that appears to be erasing some customers' data.
Apple notes that it "has discovered that a small percentage of flash storage drives in these MacBook Air models have an issue that may result in data loss. This update tests your drive and, in the majority of cases, installs new firmware to resolve the issue. If your drive cannot be updated, Apple will replace it, free of charge."
MacNN has spoken with several Apple retail stores, who told us that the issue is very rare, affecting well less than one in 500 MacBook Air 2012 models. So far, one in four MacBook Airs manifesting the data erasure flaw need to have the SSD replaced.
The update can be obtained through the "Software Update" feature of OS X, or directly from Apple.