For detailed information about this update, please visit this website: about efi firmware updates. for additional information, please visit: os x mountain lion: firmware updates may keep reappearing in the mac app store .. This update addresses the following issues for xserve (early 2009) computers: improves compatibility with virtualization products utilizing vt-d. Apple may provide or recommend responses as a possible solution based on the information provided; every potential issue may involve several factors not detailed in the conversations captured in an electronic forum and apple can therefore provide no guarantee as to the efficacy of any proposed solutions on the community forums..
I can't find exactly my problem but some threads are close. i keep getting software updates for efi firmware update 1.2. i shut down, then startup holding on-button until it flashes, release, buzz buzz, chime, then very briefly the apple logo and status bar, then gone, buzz buzz, chime and restart.. The smc update was for the fan control. the efi update was for sleep issues and other things. the 1.2f10 for smc is up to date. to see if your efi is up to date, check under applications > utilities, and look for macbookpro efi firmware update.. Ever since i updated to the efi 1.2 (and all the other app changes that were available last night) my 8-core won't stay asleep - wakes up by itself within 20 seconds. it also periodically gives a 10-20 second beep when i'm running a graphics intensive game, and now is crashing periodically while running safari..
