Deleting Mac's main driver

Discussion in 'Mac OS X' started by Dayowas, Jan 5, 2017.

  1. Dayowas

    Dayowas New Member

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    Hello, everyone!

    I want to downgrade from MacOS Siera to OS X Mavericks.
    I have backuped my Mac using Time Machine and I made USB-OS X Installer Installer. I partitioned external hard drive into two parts: the one I use to backup Mac and the other for creating USB-OS X Mavericks Installer. The thing is that when I reload my Mac with Alt/Option, enter USB Installer and open disk utility I can't delete the Main Driver, there isn't just the button to erase it, but the volume("Macintosh HD") has this button. So, how can I solve this problem?
    (Here's the zip file of some screenshots)

    Thanks in advance.
     

    Attached Files:

    Dayowas, Jan 5, 2017
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  2. Dayowas

    Cory Cooper Moderator

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    Hello and welcome.

    The top Macintosh HD (IMG_2206.JPG) is the actual hard drive device itself. The indented second Macintosh HD (IMG_2208.JPG) that has the erase button is the volume partition, which is what you want to erase.

    Hope that helps,

    C
     
    Cory Cooper, Jan 15, 2017
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