OS Upgrade Error

Discussion in 'Mac Pro' started by 4k_tech, Sep 29, 2015.

  1. 4k_tech macrumors newbie

    Sep 29, 2015

    I'm currently servicing an Early 2008 MacPro with the following specs

    Model Name: Mac Pro

    Model Identifier: MacPro3,1

    Processor Name: Quad-Core Intel Xeon

    Processor Speed: 3 GHz

    Number Of Processors: 2

    Total Number Of Cores: 8

    L2 Cache (per processor): 12 MB

    Memory: 16 GB

    All fine with the hardware but when it come down to the OS I can't upgrade beyond 10.5.8 even if my model seems to be supported by Snow Leopard.

    Tried the online version, retail disk, machine disks. No joy
    The only error I get is: OS Snow Leopard can't be installed on this drive/system

    Can I have any help, please?

  2. h9826790 macrumors G4


    Apr 3, 2014
    Hong Kong
    Do you have another HDD? Did you try to make a clean install on another HDD?
  3. 4k_tech thread starter macrumors newbie

    Sep 29, 2015
    No Joy.

    But I booted again from disk and now is working fine. It's very odd.

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