Firmware Update Mac Pro 4,1

Discussion in 'macOS High Sierra (10.13)' started by Taipan, Sep 25, 2017.

  1. Taipan macrumors 6502

    Jun 23, 2003
    Hi! This has probably been asked already, but I can‘t seem to find it:
    Last year I upgraded the firmware of my Mac Pro 4,1 to the one from 5,1 for Sierra. Now I just downloaded the final version of High Sierra, and at the start of the installation it says that it has to do a firmware upgrade for High Sierra. I‘m confused. Since my machine is not officially supported, why would it be offered a firmware upgrade? Does it do the same on an actual 5,1? And, most importantly, is it safe?
  2. chrfr macrumors 604

    Jul 11, 2009
    This is the thread you're looking for: APFS support enabled in High Sierra for cMP
  3. Taipan thread starter macrumors 6502

    Jun 23, 2003
  4. Tizucumacu macrumors newbie

    Jun 21, 2010
    i have the same question, is the Firmware Update safe for 6 core cmP 4,1->5,1 ?
  5. h9826790 macrumors G5


    Apr 3, 2014
    Hong Kong
    Yes. I am running that now.
  6. aajeevlin macrumors 6502a

    Mar 25, 2010
    Yep same situation. Let it go through with the firmware updates and it proceeded to install just fine. Took about 45 minutes total.
  7. Tizucumacu macrumors newbie

    Jun 21, 2010
    Thanks, i’m on High Sierra now also !

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6 September 25, 2017