How to Easily Create a Mac OS Sierra Bootable Installer

You can easily create a Mac OS Sierra bootable installer on a USB flash drive using Terminal. These steps will walk you through the process.

Steps to Create a Mac OS Sierra Bootable Installer

Get the latest installer

Install macOS Sierra Apple MacBook EdTechChris.com Mac OS Sierra bootable installer

Download the latest macOS Sierra Installer from the AppStore. If you get a pop up to install Sierra, simply ignore it or force quit the install from the Apple menu. Next find a USB flash drive that is at least 8GB or larger. Back up any files you want to keep off the drive as it will be erased. Insert it into one of the USB ports on your mac. This flash drive will be used for the create a Mac OS Sierra bootable installer.

Use the Terminal app

Mac OS Sierra bootable installer Terminal app Install macOS Sierra Apple MacBook EdTechChris.comOpen the Terminal app. This can be found by going to the LaunchPad and looking in the “Other” folder.

Mac OS Sierra bootable installer Other Terminal MacBook Install macOS Sierra Apple EdTechChris.comUse the following example. This is the basic syntax of the command. Replace volumepath with the path to your USB flash drive or other volume, and replace the installer path with the path to the Install macOS Sierra app. In many cases this will be in your Applications folder. The flash drive called “MyVolume” will be completely overwritten. Change this name with the name of your USB Drive.

Copy and paste the following example into Notes or TextEdit. Then change the name of “MyVolume” to the name of your USB Drive.

Mac OS Sierra bootable installer Notes Install macOS Sierra Apple MacBook EdTechChris.com

sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia –volume /Volumes/MyVolume –applicationpath /Applications/Install\ macOS\ Sierra.app

After replacing “MyVolume” copy and paste the entire command into the Terminal app. Hit return. You will be prompted to enter your password. Note: You must be an administrative user on the Mac in order to run this command.

Monitor progress in Terminal

Mac OS Sierra bootable installer Terminal progress MacBook EdTechChris.com

Next you will be prompted to enter “Y” to proceed. Then the process will begin. Read the output information displayed in terminal to follow the progress. It will erase your USB drive, rename your flash drive, and then copy the installer files. Once it is finished, you will be returned to you may quit Terminal. Be sure to eject your macOS Installer.

Mac OS Sierra bootable installer Terminal Finished EdTechChris.com Apple MacBook

Using the Installer

To use the installer, turn off the Mac you want to upgrade. Insert the flash drive. Press the power button while holding down the Option key. Continue to hold “Option” until you see the start up disk options. Select Install macOS Sierra.