Unable to Flash Firmware on 2009 Mac Pro 4 1 Running Snow Leopard

Discussion in 'Mac Basics and Help' started by iggster, Mar 15, 2019.

  1. iggster macrumors newbie

    Mar 15, 2019

    I've been trying to flash the firmware on my Mac Pro 2009 4 1 to 5 1 in order to be able to upgrade cpu to 12 core as well as RAM.

    It's currently running Snow Leopard and doesn't have a partitioned drive (no recovery mode, which means I'm unable to disable SIP).

    I've tried to flash the firmware a number of ways and no luck. Could someone please help me? Specs are the same as computers on most Youtube tutorials showing how to upgrade 2009 Mac Pro's.

    Banging my head against the wall here so any help is appreciated.


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