Deleting Mac's main driver

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

  1. Dayowas

    Dayowas New Member

    Jan 5, 2017
    Likes Received:
    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
    1. Advertisements

  2. Dayowas

    Cory Cooper Moderator

    May 19, 2004
    Likes Received:
    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,

    Cory Cooper, Jan 15, 2017
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.