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flashed mac

  1. M

    Flashed Mac Pro 5,1 strange High Sierra upgrade phenemenon

    I have a flashed to 5,1 '09 Mac Pro that had been happily running all OSs up to Yosemite and then Sierra on an OWC SSD, for maybe 4 years. A little while ago I re-flashed with a newer version that was said (on a forum devoted to the flashing process) to be necessary for High Sierra, and Sierra...