OS X Yosemite Partition from El Cap

Discussion in 'OS X El Capitan (10.11)' started by afsnyder, Jul 1, 2015.

  1. afsnyder macrumors 65816

    Jan 7, 2014
    How do I install OS X Yosemite on another partition from OS El Capitan DP2? I downloaded the App Store installer app but it doesn't open on El Capitan. What are my options?
  2. KALLT macrumors 601

    Sep 23, 2008
    Put it on a thumb drive and boot from it. Alternatively, use Internet recovery (command + option + R on boot) to install the OS that was shipped with your Mac and then upgrade to Yosemite from there.
  3. AppleFan22 macrumors regular

    Jan 3, 2014
    After you get Yosemite running, I'll assume you'd want to have it as a partition in your hard drive, yes? Create a small back up of Yosemite, create a partition of your hard drive, boot into recovery mode, and then go to the Time Machine pane. From there, you can have it install Yosemite into your new partition.

    I don't quite know how the thumb drive idea (above) works, but once you get Yosemite running, this method will finish it off for you.

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