"MacBook Air EFI Firmware Update 2.9 (4.3MB)
This update is recommended for MacBook Air (Mid 2011) models. This update addresses an issue where systems may take longer to wake from sleep than expected and fixes a rare issue that may cause fans to run at full speed after waking from sleep.
OS X 10.9.2 and later
Update over these EFI versions only:
D/L Page is dated July 15th but just saw it posted today. (Don't own a MacBook Air to know if SU had it earlier, but their doc on firmware updates doesn't have it listed yet.)
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