ML on 4.1 to 5.1 Mac Pro Upgrade

Discussion in 'OS X Mountain Lion (10.8)' started by xav8tor, Jul 19, 2012.

  1. macrumors 6502

    I know the OS and firmware are, in theory, independent, but has anyone actually installed/used Mountain Lion on a 4.1 Mac Pro with the 5.1 firmware? If so, any issues? Thanks!
  2. macrumors newbie


    I have successfuly upgraded my Mac Pro 2009 quad 2.66 4,1 to 5,1 firmware. I replaced the CPU with a six core 3.33 Intel Xeon W3680. I did that yesterday, on Mountain Lion with no trouble at all.
  3. macrumors 6502

    Thanks for the reply. That is good news. I'll soon attempt it myself.

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