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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.

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  • If you have access to MacOS, why wouldn't you just download Sierra from the app store?
    – Batman
    May 31, 2017 at 12:22
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    First of all, downloading OS X/macOS from a torrent is dangerous as it could be compromised, much less its not a legitimate way of obtaining the OS. Use Internet Recovery to install the offered OS and then upgrade it to the latest macOS through the App Store. Or Use Internet Recovery to install the offered OS and then download the macOS upgrade from the App Store, then create a USB Installer in the proper manner and then clean install it.
    – user3439894
    May 31, 2017 at 13:13
  • @Batman, I don't have any OS installed, I formatted the whole system to make clean install. So I have to use "Internet Recovery" or use "Bootable USB"
    – vs4vijay
    May 31, 2017 at 16:53
  • @user3439894, I understand that I can do using "Internet Recovery" but I don't have any stable network/wifi connection. I tried this last night but got interrupted twice and wasted my time and usage. So I would want to create a Bootable USB from *.dmg file. BTW, do you know why it Installs "Yosemite" not "Sierra" or "El Capitan"?
    – vs4vijay
    May 31, 2017 at 16:55
  • @user3439894, Suggest me if I can do "Internet Recovery" if my network connection drops multiple times? will it resume?
    – vs4vijay
    May 31, 2017 at 17:00

3 Answers 3

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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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  • I don't wanna waste my internet usage and bandwidth so I am going for option 2. However I manage to get *.dmg file not *.app file. How do I convert *.dmg to *.app?
    – vs4vijay
    May 31, 2017 at 16:52
  • Follow these instructions support.apple.com/en-gb/HT201372
    – Maximus
    May 31, 2017 at 16:55
  • Let me check. Hold on. Checked it, Its for *.app folder, not *.dmg... :(
    – vs4vijay
    May 31, 2017 at 16:56
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    Or use this software to create a USB installed macdaddy.io/install-disk-creator
    – Maximus
    May 31, 2017 at 16:56
  • What I am trying to do now: 1. Convert *.dmg to *.iso via dmg2img utility 2. Using UNetBootin, I will create bootable of that ISO. Hoping that it would work.
    – vs4vijay
    May 31, 2017 at 16:57
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If you have "Install macOS Sierra.dmg", Install it and you will get the app "Install mac OS Sierra.app" installed on your applications folder.

So to be clear, installing "Install macOS Sierra.dmg" will not install Sierra OS on the current computer but only puts the "Install macOS Sierra" app inside the applications folder.

This way you get the app. And you create the bootable USB by running the command given by Maximus.

Hope this help!

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if you re-download the installer from app store you'r able to stop and resume your dl when is finished and prompt for rebot quit the installer, now you can find the installer on the Application folder, then follow the Maximus instructions

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