Operating system for MacBook Pro (A1278)

Discussion in 'MacBook Pro' started by bernard1928, Oct 1, 2015.

  1. bernard1928 macrumors newbie

    Oct 1, 2015
    Palm Springs CA
    Broken HD cable caused loss of Opsys.
    replaced cable and tried cloning Snow leopard-No success.
    Original Opsys was Yosemity.
    Tried same again using new Hard drive-no help.
    thinking - Bios might be programmed to accept only original Yosemity.
    I(s so, would it help to clear the BIOs .
  2. Kissmyne macrumors 6502


    Apr 21, 2015
    There are known workarounds for putting unsupported operating systems onto a comp with varying degrees of success.(unsupported in this case involving installing a version of OS X that preceded delivery of the system). However I would recommend updating to OS X El Capitan, which you should be able to do without too much headache..

    If no operating system installed currently.. Use Internet Recovery(CMD+OPT+R) to reinstall Yosemite, and then update to El Capitan using the app store. Should take 2-3 hours, though your mileage will vary depending on your internet, system config etc...
  3. bernard1928, Oct 1, 2015
    Last edited by a moderator: Oct 2, 2015

    bernard1928 thread starter macrumors newbie

    Oct 1, 2015
    Palm Springs CA
    Thank you.
    appreciate your help
  4. DeltaMac macrumors G3


    Jul 30, 2003
    MBPro with that model number have been sold now for a long time (for computers!)
    The model A1278 was first sold in 2009, and came with Leopard.
    The latest A1278 is still sold new (I think). According to Apple's tech pages, the same model now ships with El Capitan.
    Makes it an interesting beast, with that wide range of operating systems for the same model number.
    However, I suspect that each year, the model from that year cannot run an operating system older than the one it shipped with it. Pretty normal for Macs.
    The older ones (before 2010 models) will not have access to the Internet Recovery. Newer ones will connect to Internet Recovery, and Apple's server will offer whatever OS X system it shipped with originally.

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3 October 1, 2015