2009 Mac Pro Firmware Upgrade Utility

Discussion in 'Mac Pro' started by weaverra, Nov 11, 2014.

  1. weaverra macrumors 6502

    Sep 27, 2006
    Has anyone tried this with Yosemite installed yet?
  2. h9826790 macrumors G4


    Apr 3, 2014
    Hong Kong
    I did that with Mavericks. However, that shouldn't be any problem (that tool is not develop for Mavericks as well). The flash utility require a cold start, and flash the Mac Pro before it load the OSX, that process should be independent to the OSX version.

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