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Q: How to clean install OS X El Capitan on iMac Retina

Greetings,

 

  I would like to do a clean install of OS X El Capitan on my iMac Retina. I don't want to do an upgrade as I have multiple software installed on my iMac that will not be compatible with El Capitan, and I don't want to remove them all. I simply want to start fresh. The issue I have found elsewhere on the internet is that because of the Fusion Drive, users who attempted to do a clean install of OS X (any version), they have ran to issues with properly setting up fusion correctly. In doing so, many have experienced that their iMacs were running slower than usual. Does anyone know how to properly do a clean install of OS X on a Fusion Drive? Will using a USB drive using the "createinstallmedia" from the OS X app properly configure the Fusion Drive for a clean install without having to resort to using the Disk Utility?

 

Thank you for your time.

iMac with Retina 5K display, OS X Yosemite (10.10.4)

Posted on Oct 2, 2015 9:51 AM

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Q: How to clean install OS X El Capitan on iMac Retina

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  • by Brian Yip,

    Brian Yip Brian Yip Jul 11, 2016 11:46 AM in response to Apple Cider
    Level 1 (9 points)
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    Jul 11, 2016 11:46 AM in response to Apple Cider

    Nice! I followed your instruction and finally fix the problem of "cannot remove old fusion drive partition".

    By the way, there is a typo of "coreStorate" in the second command line in your solution. Should be "coreStorage". It would be nice if you can fix it so that people in the future can save some time.

     

    Thanks Apple Cider!

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