How to Make a Bootable MacOS High Sierra Installer USB Drive – Quick Tutorial

By | September 20, 2017


Apple has recently launched a bunch of new products in the market with new software updates. Apple brings iPhone 8, iPhone 8 Plus and iPhone X in the market along with a new fourth generation Apple TV 4K with 4K HDR support. Now, all the products are now available in for preorders. The giant has also announces a new MacOS High Sierra which is going to be released on September 25th. Learn how you can make a Bootable MacOS High Sierra Installer from here.

The giant has also unveiled a new Apple Watch Series 3 in the market with LTE connectivity. To support this, new watchOS4 has also been announced and now available for Apple Watch Series 3. There is a new iOS 11 update also released yesterday for over 20 iDevices. And now, we all are waiting for the new macOS High Sierra. The process of making a bootable macOS High Sierra Installer is pretty simple and you can easily install this update from a USB drive with it.

Apple’s current macOS Sierra is also available to download its DMG file or Installer.ISO file to directly update your mac system with this OS. You can even get all the details about the macOS Sierra and its related updates from here.

Make a Bootable MacOS High Sierra Installer USB Drive

Since, MacOS High Sierra is yet not released for public, it is available with its beta version. In order to get its macOS High Sierra, first you have to sign up for the beta program. You can do so by clicking on to the following link.

Sign up for MacOS High Sierra Public Beta

If you are not aware about which mac system is compatible to run this macOS High Sierra Public Beta, then here’s the list of all the compatible devices which can run the maCOS High Sierra.

Compatible MacBooks for High Sierra Public Beta

  • MacBook Pro (2010 and later)
  • MacBook (Late 2009 and later)
  • MacBook Air (2010 and later)
  • Mac Pro (2010 and later)
  • iMac (Late 2009 and later)
  • Mac mini (2010 and later)

If you are running any of the above MacBook Pro, then you can proceed further with the installation process of the MacOS High Sierra.

Once you signed up with MacOS High Sierra, you will get a link to download macOS High Sierra. Click on to that link and you will see App Store’s page. Click the Download button and download the macOS High Sierra file.

After completion of the downloading process, you will see the launcher of the new macOS High Sierra. Here, you don’t have to move with the installation process. Close down the Window by pressing Command+ Q on your Mac. This will quit the Installer.

One good thing here is that, you will see the Installer app of the new macOS High Sierra update on your Applications folder. From here you can launch the Installer anytime you want to upgrade your current Mac system with the new macOS High Sierra.

Basically, there are two different ways to make a bootable MacOS High Sierra for your Mac system. You can use an application to create disk within the system or you can use Terminal Window of the system to boot it through command prompt. We would guide you to make a Bootable macOS High Sierra Installer with both the ways from here.

So, let’s get started with the process to make a bootable macOS High Sierra from here.

Make a Bootable MacOS High Sierra Installer – Quick Way

Step 1 :

Make sure to install an additional app to your Mac system called, Install Disk Creator. The app is available for free and you can install it to your Mac system from the App Store.

Install Disk Creator on Mac

Step 2 :



Click the above link once and you will taken to a download page. Download the installation file of this application from here.

Step 3 :

Double click on the Downloaded file and drag it down to the applications folder to install it on your Mac.

Step 4 :

Make sure to connect your USB Drive to the system. Make sure it is formatted and there is no any additional data stored in it. If it has important data stored, you should copy it to somewhere else. The system will format the drive to prepare an installer for the macOS High Sierra.

Step 5 :

Now, go to the Applications folder from the Dock and launch Disk Creator app.

Step 6 :

Once the app is launched, you would see a dropdown menu field with Select the volume to become the installer. Select it out from here.

Step 7 :

Since we have already downloaded the installer file of the macOS High Sierra’s beta version, the Disk Creator app will itself select this file from the system.



Step 8 :

Once done, at the end of the page, you would see Create Installer button in blue color.

Step 9 :

Once you select this option, the system will ask you to Format the disk which you are using. Make sure to select Erase Disk option when asked.

Step 10 :

Once you confirm, the process will itself take place. You could even see the progress of it at the bottom of the application Window.

Step 11 :

It will take several minutes to create the installer for your system. At the end, you will get a message about the completion of the process.

So folks, this is how you can quickly create a Bootable macOS High Sierra installer to use and to install it on a different Mac OS system without the internet connectivity. This is by far the simplest and the quickest way to do so. If for some reason, you are looking for a longer way by using various commands, the next method will guide you to do so.

Make a Bootable MacOS High Sierra Installer – Through Terminal

Step 1 :

Make sure to connect your USB Drive to the Mac system to create a Bootable MacOS High Sierra.

Step 2 :

Once it is connected to the system, launch the Terminal app on your Mac system. You can do so by click on to the Application folder and then selecting the Terminal option from the Utilities section.

Go to : Dock >> Applications >> Utilities >> Terminal

Step 3 :

This will launch the Command Prompt Window on a Mac system.

Step 4 :

Now, you have to copy a path to insert into the Command Window. Make sure to copy following command in order to move further with the process.

sudo /Applications/Install\ macOS\ High\ Sierra\ Beta.app/Contents/Resources/createinstallmedia —volume /Volumes/untitled —applicationpath /Applications/Install\ macOS\ High\ Sierra\ Beta.app

Note : The Drive name is kept as untitled here, you can change this name as per the original name of the Drive which you have inserted to your Mac System.

Step 5 :

Now, click on to the Terminal Window and Paste the above code to the Terminal Window.

Step 6 :



Once you paste the above code, hit the Enter button and the system will ask you to enter the Password of your Mac system. Make sure to enter the correct password for your system from here. The system will not show you the password character. Once done, hit the Enter or Return button.

Step 7 :

The Terminal will ask you to format the drive which you have selected from the path which we have copied and pasted. Make sure to press Y button and then the Return button for the same. This will formate the USB Drive which you have inserted.

Step 8 :

Once it is done, the system will ask you something more. You may ignore any other instructions when asked during the process.

Step 9 :

Terminal will start creating the Bootable drive by copying the files of the macOS High Sierra to the USB Drive. This process can take several minutes so you have to be patient until the process done.

Step 10 :

Once the process is done, the Terminal will show you Copy complete texts. Once you see it, you can close down the Terminal window or just quit it from the dock by right clicking on its icon and then selecting Quit option.

You’re done! You have successfully created a Bootable macOS High Sierra for the Mac system.

Both the above given methods are working well on the users who have tried them. You can choose anyone from the above listed methods which suits you better.

Now, if you want to install the macOS High Sierra to via the Bootable disk, you just need to follow a few simple steps which are given below. Let’s follow them and upgrade our current macOS system right now.

How to Install macOS High Sierra via Bootable Disk?

Step 1 :

Insert your External Drive or USB Drive which you have just created to your mac system.

Step 2 :

Now, Shutdown the system by pressing the Power button or by clicking on to the Apple logo at the upper left corner and select the Shut down option.

Step 3 :

Now, start your system and during the starting process, press the Option button.

Step 4 :

The system will show you the Startup Manager of your system. Here, you could see the available installers for your system.

Step 5 :

You could see the drive which you have inserted as well. Click on the option of macOS High Sierra from here.

Step 6 :

After selecting the drive, the system will show you the macOS Utilities which you can select as per your requirements. You can eight select just the Install option to update your macOS or can wipe out all the data. Choose a proper option and then hit the Continue button.

That’s all you have to do! Just sit back and relax for sometime. The system will start the installation process of the new macOS High Sierra. It will take several minutes to complete the process. You could even see the progress of it on the Screen of your mac system.



  • Ben

    Thank you so much! I had to make a bootable install disk to get ready for the GM candidate (I’m a beta tester) but the instructions that Apple gave me weren’t working. Yours worked out beautifully (I used the Terminal steps) and can now get my iMac properly updated. Thank you so much!