How To Create macOS Sierra 10.12 Bootable USB Flash Drive Installer – [Guide]


Here’s how to create macOS Sierra 10.12 bootable USB flash drive installer to clean install latest operating system for MAC. Apple has released new version of its desktop and laptop OS – called macOS Sierra – for iMac, Macbook Air, Macbook Pro and Macbook 13-inch lineups. And here we are going to explain in a step-by-step guide on how you can make bootable USB flash drive using the installation files of the final released version of macOS Sierra from the official Mac App Store.

The guide below will help you to clean install macOS Sierra on Mac to replace current older Mac OS X version. macOS Sierra comes with many new features, bug fixes, improvements and better support for third-party apps and software. If you want to complete delete the current OS from your MAC to upgrade to the new macOS Sierra then see the guide below. This process below will completely remove the current OS from your MAC, so backup all current data before proceeding.


Here are some requirements that need to be satisfied before the successful creation of bootable USB flash drive for macOS Sierra.


First of see a list of MACs that are supported to run macOS Sierra:

  • iMac (Late 2009 or newer)
  • Mac Pro (Mid 2010 or newer)
  • MacBook (Late 2009 or newer)
  • MacBook Pro (Mid 2010 or newer)
  • MacBook Air (Late 2010 or newer)
  • Mac mini (Mid 2010 or newer)

If you device doesn’t fall in the above list then either keep using OS X 10.11 El Capitan or buy a new iMac/MacBook with macOS Sierra pre-installed.

Another thing that you will need is a USB flash drive with minimum 16GB capability. The process below will wipe out current data on flash drive, so backup all data before create a bootable USB flash drive. You will need stabled internet connection to access Mac App Store and approx. 30 minutes of your time.


How to Create macOS Sierra 10.12 Bootable USB Flash Drive

1 – Head to the Mac App Store and download macOS Sierra 10.12 installer app. It’s named ‘Install macOS Sierra’.

2 – Connect the USB flash drive to your MAC.

3 – Launch the Disk Utility app to format the connected flash drive. On the left side of the Disk Utility app interface, select the connected USB drive, and then click on the Erase button.

4 – Now set the name of the flash drive, it can be any name (however, once in the terminal to send commands, make sure that USB flash drive name is addressed as ‘drive’ and not by the name you just chose). Next, under the name field, select the format as OS X Extended (Journaled) and the Scheme field is set as GUID Partition Map. After that hit the Erase button.

5 – When the USB flash drive is successfully erased, launch the terminal app which you can find in ‘Applications/Utilities’ folder or find it via Spotlight search.

6 – Now type in the following command to create the installation media on the USB flash drive with administrator privileges. Hit enter after typing the this command below on the terminal:

sudo/Applications/Install\macOS\ –volume /Volumes/Untitled –applicationpath /Install\ macOS\ –nointeraction &&say Done

Be careful when entering the command, make sure to avoid syntax and typing errors otherwise command won’t execute. Make sure dashes in the above command are double dashed and not single dash.

7 – Now when asked, enter your MAC administrator password on the terminal screen to run sudo command with additional privileges and hit enter.

8 – Now the process of creating macOS Sierra bootable USB flash drive will begin, be patient as it may take several minutes to complete. At the successful conclusion of the process, you will see Done message displayed at the bottom of the terminal screen signifying that the bootable flash drive has been created.

That’s all. Quit the terminal screen and safely remove USB flash drive from MAC. Now you can use this newly created bootabel USB drive to clean install macOS Sierra 10.12 whenever you like in future. For queries, reach out to use via comments section below.

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