More info... Apple has a firmware updater available that might fix the problem. http://support.apple.com/kb/DL1690?viewlocale=en_US&locale=en_US <http://9to5mac.com/2013/10/17/apple-releases-flash-storage-firmware-update-1-1-for-mid-2012-macbook-air-to-resolve-potential-data-loss-issues/> or http://is.gd/gJEY17 ___________________________________________ Randy B. Singer Co-author of The Macintosh Bible (4th, 5th, and 6th editions) Macintosh OS X Routine Maintenance http://www.macattorney.com/ts.html ___________________________________________