How To Create macOS High Sierra Bootable USB Installer [Tutorial]

make bootable usb installer for macos high sierra

macOS 10.13 High Sierra Flashable USB Installer is necessary to perform clean install of Apple’s new desktop operating system on a Mac desktop or laptop device. Here is a step-by-step tutorial on how to make macOS High Sierra USB flash drive Installer for fresh installation of the OS on your Mac.

Now is the best time to update your iMac, Mac Pro or MacBook to the latest macOS 10.13 High Sierra. Basically you will need to create a USB Installer flash drive to save the installation file of the final version of the macOS High Sierra software available for download from the Mac App Store. You can then use macOS High Sierra bootable USB installer drive to clean install the latest full final Mac OS from Apple.

Obviously clean installation will wipe out any currently installed Mac OS X / macOS operating system and its related data from your Mac. USB installer disk is a must to clean install macOS High Sierra on Mac. In this step-by-step guide, you’ll learn how to create one easily. But there are somethings you need to do before starting the process of creating macOS High Sierra USB Installer driver.


  • A macOS High Sierra compatible device running any version of OS X or macOS. Here is the link where you will find a complete list of all Mac devices compatible with the macOS 10.13 High Sierra.
  • A USB flash drive with a minimum 16GB (recommended) or 8GB (required). Make sure already saved data on the flash drive is backed up somewhere else as the process below will erase whatever is on it.
  • A Mac desktop or laptop connected to an internet and access to the Mac App Store.

How To Create Bootable USB Installer for macOS High Sierra

First up, you have to make sure USB flash drive is properly formatted so that OS system files do not conflict with anything currently installed on the flash drive. See these steps below for it:

Format USB Installer Drive To Create Bootable Drive for macOS High Sierra

Step 1 – First, you need to download the macOS High Sierra image file: here is the link to download macOS 10.13 High Sierra installer app from the Mac App Store. Download the app named “Install macOS High Sierra” from the app store.

Step 2 – Once the download is complete, do not install it yet. Just leave the image file as it is in the Applications folder.

Step 3 – Now, plug in USB flash drive to your Mac and follow the steps below. Follow the steps as mentioned to avoid making mistakes as we will not be responsible for any damage to your device.

Step 4 – Make sure USB drive is plugged to your Mac. Next, launch Disk Utility. You can launch it from the Spotlight Search by quickly searching for it in the Disk Utility.

Step 5 – One the Disk Utility is launched, select your USB driver from the available choices on the left side of the interface screen and click on the Erase button at the top.

Step 6 – Do not make any changes in the message box, leave everything unchanged in the “Name”, “Format”, and “Scheme” fields as shown in the image below, and then hit the Erase button.

mac disk utility

Congrats! you have successfully erases USB drive, now move on to the next stage as explained in the steps below.

Make macOS High Sierra USB Installer:

Moving on to the final stage of the USB Installer driver creation process. Make sure to carefully read all steps below starting as a slight mistake could waste all your effort.

Step 1 – Plug in the formatted USB drive to your Mac. Skip if already plugged in.

Step 2 – Launch Terminal on Mac. You can use quick Spotlight search to open Terminal.

Step 3 – Now type the following command exactly as it. Do not make mistake while entering it. Also make sure USB drive is properly plugged in.

sudo /Applications/Install\ macOS\ –volume /Volumes/Untitled –applicationpath /Applications/Install\ macOS\

Note: In the above command there are actually double dashes, which many mistake for single dashes. See this screenshot image below to get a better idea. Make sure to enter the command with double dashes where applicable.


Step 4 – Next, you will be prompted to enter your Mac’s administrator password and login detail and hit enter.

Step 5 – Now wait as the Terminal command executes on your Mac and does its thing in the background. Do not touch anything. Entire command execution process normally takes around 15 – 20 minutes, depending on the speed on your Mac. When complete, you will see ‘Done’ at the bottom to indicate that the drive has been created successfully.

Step 6 – That’s it.

Close the Terminal command and eject USB drive. Now that you have created macOS High Sierra USB Installer, you can now use it to clean install latest desktop OS from Apple as described in this guide here: How To Clean Install macOS High Sierra on Mac.

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