Updating software question

Discussion in 'iMac' started by tl01, Sep 17, 2015.

  1. tl01 macrumors 68020

    Jun 20, 2010
    May this be the last question I have for the week!

    I have an older iMac that I want to upgrade to Yosemite. I have to clean off the hard drive too. I have a drive I will use for time machine back ups and anything else necessary. If I want to start fresh and upgrade to Yosemite... Is there a way to do this using the hard drive? If so, how should I partition the drive first? Can one download the OS to the back up drive?

    Or is there a better way to do this?
  2. Samuelsan2001 macrumors 604

    Oct 24, 2013
    Use an 8GB thumb drive to create a bootable usb of yosemite.

    Here are the instructions


    Then you can reinstall any apps and migrate your data from your time machine back up.

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