Mac – How to install MacOS Sierra DMG to Bootable USB

bootmacusb

I have MacBook Pro (Mid 2012) model, and I formatted the whole hard-drive to create partitions on 500GB HDD. So now I don't have any OS installed on MacBook and for booting I use Cmd+Opt+R and It gives me "Internet Recovery" option. After that It prompts me "OS X Utilities". From there I choose "Re-install MacOS" and It gives me Yosemite installation.

The problem is, I don't want to install Yosemite, I want to install macOS Sierra but it is prompting me to download Yosemite. So I downloaded a Install macOS Sierra.dmg file from torrents and now I want to create a Bootable USB drive.

While searching for solutions on net, I found poeple are installing from "Install macOS Sierra**.app**", not from ".dmg" extension.

Quesion

Please suggest me how would I create Bootable USB from Install macOS Sierra.dmg? I don't have "*.app" folder.

I have access to my other machines with MacOS and Ubuntu to make it happen.

Best Answer

Here's what you need to do, you have two options:

  1. Use Internet Recovery to install Yosemite, like you were doing earlier, and then either upgrade to macOS Sierra via the App Store or just download the macOS Sierra upgrade to create a macOS Sierra USB Installer from.

  2. To create a macOS Sierra USB Installer you need a working Mac so you can download macOS Sierra from the App Store and with a blank USB stick run this command via Terminal. Make sure you first reformat the USB stick using Disk Utility to Mac OS X Extended (Journaled). Also rename the USB stick to: Untitled

    Use the following command:

    sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ macOS\ Sierra.app --nointeraction

    Then perform a clean install using the macOS Sierra USB Installer.

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