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   MacBook Air EFI Firmware Update 2.9

   Agen G. N. Schmitz

   Apple has released [1]MacBook Air EFI Firmware Update 2.9 for MacBook
   Air models released in mid-2011. Ostensibly, the update addresses two
   issues related to waking from sleep ' a bug that prevented waking in a
   timely maner and a problem that caused fans to run at full speed after
   waking. However, there are multiple reports on a [2]discussion thread
   at Apple Support Communities that installation of the firmware update
   is causing some MacBook Air laptops to shut down completely and not
   start up again for a lengthy amount of time (so much for that timely
   waking fix). Additionally, other users report still seeing the EFI
   update in the Mac App Store's Update section even after applying the
   firmware multiple times. This might be one to wait on for a few days to
   see if Apple reissues EFI Firmware Update 2.9. (Free, 4.1 MB, 10.9.2+)

References

   1. http://support.apple.com/kb/DL1756
   2. https://discussions.apple.com/thread/6460212

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