SMC EFI Win8 and a whole lot of grief

Discussion in 'MacBook Air' started by conexor, Dec 17, 2013.

  1. conexor macrumors newbie

    Dec 17, 2013
    I have a macbook air mid 2012 which until recently would dual boot either mac or win8. The grief started when I upgraded to win8.1. Now all I get after a spinner thing is a blank screen. Black or very dark blue.

    Figured I should ensure that the firmware was up to date, I booted to the mac side. Both the SMC and EFI are not current.

    So I downloaded the current files and tried to install them but for either file I get an error
    "Alert This software is not supported on your system"


    Now for a bit more detail....
    I know the model is a mid 2012 model because I typed the serial number into the mac web site here

    Also in About this Mac I get

    Current MAC System Information
    Model Name : MacBook Air
    Model Identifier: MaBookAir5,2
    Processor: Intel core i5
    Processor speed: 1.8GHz
    Number of processors: 1

    Boot Rom Version: MBA51.00EF.B00
    SMC Version(system) 2.5f7

    Then on this page

    MacBook Air (13-inch, Mid 2012)
    MBA51.00EF.B02 (EFI 2.6)
    2.5f9 (SMC 1.9)

    So I downloaded the two files and clicked on them.

    IS there a separate installer program I should use?

    Thanks in advance
  2. conexor thread starter macrumors newbie

    Dec 17, 2013
    surely someone can help

    i could really do with a pointer on this
  3. budgynana macrumors member

    Nov 28, 2010
    What OS are you on? You may need to update before it will work.

    My MBA was on 10.8.4 when I got it and then 10.8.5 came out, which I didn't update to straight away, followed shortly by an SMC update. When I went to update the SMC I couldn't, Mountain Lion said there was no system update available and the installer on its own - downloaded manually - wouldn't work either. Then I updated to 10.8.5 and the update automatically appeared...

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