Yosemite crashed on second partition, cannot reinstall it

Discussion in 'OS X Yosemite (10.10)' started by 1beginner, Nov 15, 2015.

  1. 1beginner macrumors newbie

    Feb 7, 2010
    Hello everybody,
    I have something weird going on. Please help, as i use this computer for work. I am working from home
    macbook pro 2007 late a1226. 4 gb memory, 500 hd , 2.2hg
    I had installed 10.6.8 in the beginning. I needed to upgrade for older OS for some programs.
    SOMEHOW I managed to install 10.10.2 on a second partition. All worked till one day it crashed.
    I formatted that volume and tried to install from booting. But it is not bootable now.
    So 1 partition boots fine ( 10.6.8) but old partition, where yose was before cannot boot.
    I ordered USB stick with Yosi. But Now I am wondering if i will be able use it..

    Any ideas on how to install yosi on not bootable partition? or How to erase all and create 2 parttions again and make things work?
    Guys in apple store said they cannot help me. I wish i could remember how i installed it. I remember it wasn't easy and i used my backup to install it on. Then I upgraded to Yosi via installer.

    Thanks a lot!
  2. Ebenezum macrumors 6502a

    Mar 31, 2015
    Do you have backup of Yosemite partition?

    Did you format the partition using 10.6.8 or Yosemite?

    Have you tested disk with Disk Utility?

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