How to dual boot macOS Sierra & OS X Yosemite?

Discussion in 'Mac Basics and Help' started by Technologx, Jul 15, 2016.

  1. Technologx macrumors member

    Technologx

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    #1
    I have a 1TB HDD I've already partitioned it to be both 500GB. The main partition has macOS Sierra installed and the other partition I want to install OS X Yosemite. The Yosemite update I have is a pkg file and when I try to open it it won't allow me because I'm not running 10.10. So what do I need to do to be able to install Yosemite on the partition?
     
  2. Mr_Brightside_@ macrumors 68020

    Mr_Brightside_@

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    #2
    Use DiskMakerX to install it onto a USB drive, boot off that, install 10.10 into the blank partition.
     
  3. Technologx thread starter macrumors member

    Technologx

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    #3
    It didn't work it's asking for ASObjC Runner.app and it won't work with a pkg file
     
  4. CoastalOR macrumors 68000

    CoastalOR

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    #4
    You need the full Yosemite installer (Install OS X Yosemite.app) to do a install of Yosemite on you other partition.

    The Yosemite updater can not do a full install. As you have already encountered the Yosemite updater pkg can't launch without Yosemite is already installed since it only contains the files to "update" an existing Yosemite installation.

    BTW, DiskMakerX also require the "Install OS X Yosemite.app" to create a bootable USB installer.
     
  5. Technologx thread starter macrumors member

    Technologx

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    #5
    I used Mavericks I can't find the Install OS X Yosemite app
     
  6. supermariofan25 macrumors regular

    supermariofan25

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    Feb 7, 2011
    #6
    You can get the 'Install OS X Yosemite.app' from the App Store for free, even when using macOS Sierra (It will give you a warning saying that the version you are downloading is older then the version installed, just click Download Anyway or something similar to that.)
     
  7. Technologx thread starter macrumors member

    Technologx

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    #7
    I can't because the Mac AppStore is showing that I never even downloaded it when that was the place I downloaded it from when it 1st came out.
     
  8. supermariofan25 macrumors regular

    supermariofan25

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    #8
  9. Technologx thread starter macrumors member

    Technologx

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    #9
  10. kryten2, Jul 27, 2016
    Last edited: Jul 27, 2016

    kryten2 macrumors 6502a

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    #10
  11. Technologx thread starter macrumors member

    Technologx

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