How to make a bootable usb installer for Sierra GM and public release

Discussion in 'macOS Sierra (10.12)' started by tywebb13, Sep 7, 2016.

  1. tywebb13, Sep 7, 2016
    Last edited: Sep 20, 2016

    tywebb13 macrumors 68020

    Apr 21, 2012
    Bootable USB installer of Sierra GM and public releases

    To make the bootable usb of Sierra GM and public releases format an 8 GB (or preferably 16GB) USB3 drive which should be called Untitled and formatted as Mac OS Extended (Journaled). The installer should be called Install macOS and should be in your Applications folder.

    Run this in terminal and wait about 20 minutes:

    sudo /Applications/Install\ macOS\ --volume /Volumes/Untitled --applicationpath /Applications/Install\ macOS\ --nointeraction
  2. tywebb13 thread starter macrumors 68020

    Apr 21, 2012
    Also, reverting core storage still works in Sierra.

    If the installation creates a core storage logical volume you can revert it to get partitions back to normal by running these 2 commands in terminal.

    diskutil cs list

    and then

    diskutil coreStorage revert lvUUID

    where lvUUID is the last lvUUID reported by the previous Terminal command.

    Then restart for everything to get back to normal after you have run these commands in Terminal.

    This is good if you want the recovery partition to show up in the startup manager you get when booting up with the option key.
  3. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
    There is no need for all this. Just run the command below using whatever your OS volume name is in place of the default Macintosh HD.

    diskutil cs revert "Macintosh HD"
  4. tywebb13 thread starter macrumors 68020

    Apr 21, 2012
    I still think you should run this to see if you even have something to revert first:

    diskutil cs list

    And if there is only 1 core storage volume you can do it a shorter way too:

    distil cs revert /

    But I prefer to do it the long way because it is more specific.

Share This Page