Create High Sierra Boot Disk

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Sep 28, 2017 Select the disk volume for your boot disk, then click “Choose this disk”. In this case, select “High Sierra Installer” (or the name of your disk) and then click “Choose this disk”. One last opportunity to stop. You’re warned that the volume will be erased. Click “Erase then create the disk” and DiskMaker X 7 then reminds. TransMac creates a macOS USB bootable drive warning. Once you complete the steps, you can now insert the USB flash drive on your Mac computer to install, reinstall, or upgrade the operating system to the latest macOS version, which can be Sierra, Catalina, Big Sur, Monterey, or higher. Create a GPT partition on a USB flash drive. Sep 27, 2017 First the disk will be deleted, then the entire installer will be copied to your disk. The process will take a while, but when it’s done you’ll have a bootable drive with the installer. Notice that the Utilities folder, offered by DiskMaker X, is not here. The command above is specifically for High Sierra (and a disk named “Installer.”).

With the high sierra usb installer connected to the mac, restart the computer ( apple menu restart) and hold down the option key. At the boot menu choose the macos high sierra 10.13 beta install from the boot loader screen where the installer will load. From the bootable drive you can format, partition, update, or install macos high sierra. As of today, I was able to a successfully boot and launch the High Sierra installer from an ISO image that I converted from the High Sierra 10.13.6 installer that I downloaded from the Apple Store (converted using Pat's Nov. 2017 instructions above).

These advanced steps are primarily for system administrators and others who are familiar with the command line. You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful when you want to install on multiple computers without downloading the installer each time.

Download macOS

Boot

Find the appropriate download link in the upgrade instructions for each macOS version:

  • macOS Catalina, macOS Mojave, and macOS High Sierra download directly to your Applications folder as an app named Install macOS Catalina, Install macOS Mojave or Install macOS High Sierra. If the installer opens after downloading, quit it without continuing installation.
    To get the required installer, download from a Mac that is using macOS Sierra 10.12.5 or later, or El Capitan 10.11.6. Enterprise administrators, please download from Apple, not a locally hosted software-update server.
  • macOS Sierra downloads as a disk image that contains a file named InstallOS.pkg. Open this file and follow the onscreen instructions. It installs an app named Install macOS Sierra into your Applications folder.
  • OS X El Capitan downloads as a disk image that contains a file named InstallMacOSX.pkg. Open this file and follow the onscreen instructions. It installs an app named Install OS X El Capitan into your Applications folder.

Use the 'createinstallmedia' command in Terminal

  1. Connect the USB flash drive or other volume that you're using for the bootable installer. Make sure that it has at least 12GB of available storage and is formatted as Mac OS Extended.
  2. Open Terminal, which is in the Utilities folder of your Applications folder.
  3. Type or paste one of the following commands in Terminal. These assume that the installer is still in your Applications folder, and MyVolume is the name of the USB flash drive or other volume you're using. If it has a different name, replace MyVolume in these commands with the name of your volume.
    Catalina:*
    Mojave:*

    High Sierra:*
    Sierra:
    El Capitan:
  4. Press Return after typing the command.
  5. When prompted, type your administrator password and press Return again. Terminal doesn't show any characters as you type your password.
  6. When prompted, type Y to confirm that you want to erase the volume, then press Return. Terminal shows the progress as the bootable installer is created.
  7. When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Catalina. You can now quit Terminal and eject the volume.

The easiest way to create a USB flash installer is with the free program, Disk Creator. Download the macOS Sierra installer and Disk Creator. Insert an 8GB (or larger) flash drive. If you have any.

* If your Mac is using macOS Sierra or earlier, include the --applicationpath argument, similar to the way this argument is used in the commands for Sierra and El Capitan.

Use the bootable installer

After creating the bootable installer, follow these steps to use it:

  1. Plug the bootable installer into a compatible Mac.
  2. Use Startup Manager or Startup Disk preferences to select the bootable installer as the startup disk, then start up from it. Your Mac will start up to macOS Recovery.
    Learn about selecting a startup disk, including what to do if your Mac doesn't start up from it.
  3. Choose your language, if prompted.
  4. A bootable installer doesn't download macOS from the Internet, but it does require the Internet to get information specific to your Mac model, such as firmware updates. If you need to connect to a Wi-Fi network, use the Wi-Fi menu in the menu bar.
  5. Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions.
  1. Jan 28, 2020 After creating the bootable installer, follow these steps to use it. Plug the bootable installer into a compatible Mac.; Use Startup Manager or Startup Disk preferences to select the bootable installer as the startup disk, then start up from it.
  2. Dec 16, 2019 Find the installer in your Applications folder as a single ”Install” file, such as Install macOS Catalina. If you're downloading macOS Catalina, macOS Mojave, or macOS High Sierra for the purpose of creating a bootable installer, your Mac must be using macOS Sierra 10.12.5.

Learn more

For more information about the createinstallmedia command and the arguments that you can use with it, make sure that the macOS installer is in your Applications folder, then enter this path in Terminal:

Catalina:

Mojave:

Disk

High Sierra:

Sierra:

El Capitan:

There are times when you may not want to use the App Store or the recovery mode to install macOS 10.13 High Sierra on your Mac. So Apple gives you the option of creating a bootable USB drive. You can use it anytime and anywhere to quickly get the operating system running on any compatible Mac. An Internet connection is not even required as everything you need is already on the drive.

Creating a bootable macOS 10.13 High Sierra USB drive is very easy. All you need is a Mac, as the tools provided for the process are only available on OS X and macOS, and a USB drive with a capacity of 8GB or more. I will also explain how to use a dedicated third-party tool, in case you decide that this option suits you better.

See Also:

Create High Sierra Boot Disk Mac

But first you have to download the setup file from App Store. Use this link to take you right to its landing page, or search for it manually in the App Store app. After the download is complete, Install macOS High Sierra will be available in your Applications folder. A setup wizard should have appeared by now -- you can close it.

Also, you should backup the contents of the USB drive that you are using for the process, as everything that is stored on it will be removed. And, of course, make sure that you read the instructions carefully before starting.

Apple's Way, All the Way

Create High Sierra Boot Disk Free

Apple offers a dedicated tool in OS X and macOS specifically for the purpose of creating a bootable USB drive. Unlike most tools that ship with the OS, it is not accessible directly from Launchpad. However, it can be accessed through Terminal, which you will have to open for this part of the process.

Here is what you need to do:

  1. Connect the USB drive to your Mac
  2. Using Disk Utility (it is typically found in the Other folder, under Launchpad), format the USB drive as Mac OS Extended (Journaled), using the GUID Partition Mac scheme, and name it macOSHighSierra. This can be done from the Erase tab within the app; make sure that there are no multiple partitions (turn to the Partition tab to verify and correct this)
  3. Open Terminal (it is found in the same folder as the Disk Utility app)
  4. Use (paste) the following command: sudo /Applications/Install macOS High Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/macOSHighSierra --applicationpath /Applications/Install macOS High Sierra.app --nointeraction
  5. Type in your user password, when required, to start the process

Create High Sierra Boot Disk Windows 7

Based on my experience, this is the best method of creating a bootable macOS 10.13 High Sierra USB drive. It delivers consistent results every time, and does not cause any issues.

Because it is barebones, the tool does not provide any indication as to how much time is left until the process completes. It usually takes around half an hour in my case, but this depends on the speed of the USB drive -- the faster it is the sooner this step is over.

The User-Friendly Tool

DiskMaker X (currently at version 7) is the more user-friendly tool for the job. It automates the process of creating a bootable macOS 10.13 High Sierra USB drive, requiring little input from you. And the results are virtually the same with the aforementioned method.

If you wish to use DiskMaker X to create the bootable macOS 10.13 High Sierra USB drive, here is what you need to do:

Create High Sierra Boot Disk

  1. Connect the USB drive to your Mac
  2. Open DiskMaker X and Select Use this copy to use the Install macOS High Sierra app from the Applications folder (Select Use another copy... if the setup file is in another folder)
  3. Select An 8 GB USB thumb drive. (Alternatively, select Another kind of disk if you want to use something else)
  4. If requested, from the given list, select the USB drive you are using for the process, and then select Choose this disk
  5. Select Erase then create the disk
  6. Select Continue
  7. Type in your user password when requested

Create Bootable Usb Mac Os High Sierra Dmg Download

Unlike the official tool baked in OS X and macOS, DiskMaker X also lets you know how long the process takes. Like I mentioned before, this depends largely on the speed of the USB drive that you have, so, ideally, you should use the fastest one available, in case time is of the essence.

Create High Sierra Boot Disk File

Create High Sierra Boot Usb

What Now?

Create Bootable Usb Mac Os High Sierra Dmg File

Now that you have a bootable macOS 10.13 High Sierra USB drive, you should know how to install the operating system on your Mac.

Create a mac high sierra boot disk

Create Mac Os Usb Installer

What you need to do is restart your Mac, and, right after that, press the Option key, and choose to boot from this USB drive. Afterwards, you can use the step-by-step setup as you normally would to install and setup macOS High Sierra.