Macos Boot To Usb

  • Part 4: Boot Mac from macOS USB Drive for Installation. Now remove the USB drive and insert it into the Mac computer. To boot from the disk, you need to hold down the option key when you hear the boot chime. This will take you to the Startup Disk Manager, where you should be able to see the USB drive.
  • If your Mac still refuses to boot off your USB stick you may find it easier to boot and install off an Ubuntu DVD instead. See our How to burn a DVD on macOS for further details. Alternatively, if you feel confident using the macOS command line, see the community documentation on How to install Ubuntu on MacBook using USB Stick for a more.

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.

If you want to do a clean install of macOS Sierra, or you have multiple Macs to install it on, then a bootable flash drive for is your best bet for easy installation. Here’s how to make one.


What you need to create a bootable installer

  • A USB flash drive or other secondary volume formatted as Mac OS Extended, with at least 14GB of available storage
  • A downloaded installer for macOS Big Sur, Catalina, Mojave, High Sierra, or El Capitan

Download macOS

  • Download: macOS Big Sur, macOS Catalina, macOS Mojave, or macOS High Sierra
    These download to your Applications folder as an app named Install macOS [version name]. If the installer opens after downloading, quit it without continuing installation. To get the correct 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.
  • Download: OS X El Capitan
    This downloads as a disk image named InstallMacOSX.dmg. On a Mac that is compatible with El Capitan, open the disk image and run the installer within, named InstallMacOSX.pkg. It installs an app named Install OS X El Capitan into your Applications folder. You will create the bootable installer from this app, not from the disk image or .pkg installer.

Use the 'createinstallmedia' command in Terminal

  1. Connect the USB flash drive or other volume that you're using for the bootable installer.
  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 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.

Big Sur:*



High Sierra:*

El Capitan:

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

How to download netflix on my mac air. Since Netflix is available for Windows, you can download Windows on your Mac, run it and install the Netflix app there to watch the downloaded content. It may be a bit tedious, but if you really want to download Content from Netflix, it works.

After typing the command:

  1. Press Return to enter the command.
  2. When prompted, type your administrator password and press Return again. Terminal doesn't show any characters as you type your password.
  3. When prompted, type Y to confirm that you want to erase the volume, then press Return. Terminal shows the progress as the volume is erased.
  4. After the volume is erased, you may see an alert that Terminal would like to access files on a removable volume. Click OK to allow the copy to proceed.
  5. When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Big Sur. You can now quit Terminal and eject the volume.

Use the bootable installer

Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps:

Apple silicon

  1. Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you're installing.
  2. Turn on your Mac and continue to hold the power button until you see the startup options window, which shows your bootable volumes and a gear icon labled Options.
  3. Select the volume containing the bootable installer, then click Continue.
  4. When the macOS installer opens, follow the onscreen instructions.

Intel processor

Macos Bootable Iso To Usb

  1. Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you're installing.
  2. Press and hold the Option (Alt) ⌥ key immediately after turning on or restarting your Mac.
  3. Release the Option key when you see a dark screen showing your bootable volumes.
  4. Select the volume containing the bootable installer. Then click the up arrow or press Return.
    If you can't start up from the bootable installer, make sure that the External Boot setting in Startup Security Utility is set to allow booting from external media.
  5. Choose your language, if prompted.
  6. Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions.

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 the appropriate path in Terminal:

  • Big Sur: /Applications/Install macOS Big
  • Catalina: /Applications/Install macOS
  • Mojave: /Applications/Install macOS
  • High Sierra: /Applications/Install macOS High
  • El Capitan: /Applications/Install OS X El

A bootable installer doesn't download macOS from the internet, but it does require an internet connection to get firmware and other information specific to the Mac model.

On this page:

  • Installation guide


If you wish to run both macOS and Windows on a single Mac computer, UITS recommends using Apple's Boot Camp utility to install a 64-bit version of Windows on your Mac. In macOS, the Boot Camp Assistant app will help you partition your Mac hard drive to accommodate both operating systems, so you can install Windows from an installation disk or an ISO image stored on a USB flash drive.

Partitioning your system's hard drive with Boot Camp Assistant may erase all your data. Before proceeding, back up/copy all personal files (documents, pictures, music, videos) to a flash drive, external hard drive, or cloud storage. Alternatively, you can use Time Machine with an external hard drive to back up your entire Mac computer; for instructions, see Mac Basics: Time Machine backs up your Mac. If you need assistance setting up Time Machine, contact your campus Support Center.

Pre-installation notes

  • This guide is written for macOS High Sierra, version 10.13.x or newer. If your computer cannot run macOS High Sierra version 10.13.x, you will need to follow Apple's Boot Camp Help: Install Windows on your Mac. If you don't have access to the online guide via a different device, print a copy of the Boot Camp Installation & Setup Guide.
  • Determine whether your computer can run Windows 10; refer to Apple's System requirements to install Windows on your Mac using Boot Camp.
  • To determine if your Mac supports this feature, open Boot Camp Assistant (Go > Utilities > Boot Camp Assistant), and then click Continue. If you see a 'Create a Windows 7 or later install disk' checkbox, your Mac supports this feature.
  • Make sure your computer meets these requirements:
    • At least 80 GB of free hard drive space
    • You have either the keyboard and mouse (or trackpad) that came with your Mac, or a USB keyboard and mouse
  • Obtain a USB flash drive (at least 16 GB).
  • During installation, you will be prompted to enter an account name and password; this is for the administrator account, and should not be the one you generally use. You also will be prompted to enter your time zone.
  • Ensure that the computer is plugged into a power source, as the entire process may take several hours.

Installation guide

  • These instructions are intended strictly as a guide for installing a fully updated 64-bit version of Windows on a macOS High Sierra 10.13.x or newer computer at IU; if your computer cannot run that version of macOS, you'll need to follow Apple's Boot Camp Help: Install Windows on your Mac.
  • Perform these steps in order.

Step 1: Check for macOS updates

Macos How To Boot From Usb

Before configuring Boot Camp, it is critical to make sure that your Mac's software is up-to-date, which lessens the risk of encountering problems during installation:

  1. In the menu bar, from the Apple menu, click App Store.
  2. At the top of the window, click Updates.
  3. If there are updates for your computer, in the upper right corner of the window, click Update All.

    If you're prompted, enter an administrator's username and password, and if prompted, allow your computer to restart.

When your computer restarts, check for additional updates by repeating the steps above. Repeat the process until there are no new updates in the App Store.

Step 2: Confirm your macOS version

In the menu bar, from the Apple menu, click About This Mac. The window will display the version of macOS on your computer. If you aren't running macOS High Sierra (10.13.x), you need to follow Apple's Boot Camp Help: Install Windows on your Mac.

Macbook Boot To Usb

Step 3: Turn off FileVault

To proceed, you need to divide your Mac's hard drive into a section for macOS and a section for Windows. This process is called partitioning a disk, and requires that you disable FileVault (whole-disk encryption provided by Apple):

  1. In the menu bar, from the Apple menu, click System Preferences.
  2. Click Security & Privacy.
  3. Click FileVault. The FileVault control panel will open, locked by default.
  4. Before you can disable FileVault, it requires you to unlock the control panel to show that you're an administrator on your computer. To do so, click the lock icon. Enter your administrator username (if required) and your password.
  5. You'll then be able to click Turn Off FileVault... To confirm, click Turn Off Encryption.

    Decrypting an encrypted drive can take some time, the exact time being determined by how much data is on your disk, the disk size, and your computer's hardware capabilities.

Step 4: Download Windows 10

The version of Windows 10 on IUware will not work with Boot Camp; you'll need to download Windows directly from Microsoft, and use a product key you get from IUware.

Mac os boot to usb drive

Downloading Windows 10 Education takes some time, depending on the speed of your internet connection. Do not attempt the download on a metered connection, such as a tethered cell phone.

  1. Get a product key:
    1. Go to IUware.
    2. On the left, click PC.
    3. Click Windows 10 Education, and choose the 64-bit version.
    4. Click Log in. If prompted, log in with your IU username and passphrase.
    5. Write the product key (a series of letters and numbers that resembles 'XXXXX-XXXXX-XXXXX-XXXXX-XXXXX') on paper, since you won't be able to open anything on your Mac while Windows is being installed.
  2. Download Windows 10:
    1. Navigate to Microsoft's Software Download page, and click Windows 10.
    2. In the Select edition drop-down list, choose Windows 10, and click Confirm.
    3. Select the appropriate language, and click Confirm.

Step 5: Use Boot Camp Assistant

Back up your files if you haven't yet done so. Partitioning your system's hard drive with Boot Camp Assistant may erase all files. To learn more, see Back up your Mac. For details about backing up your documents and content using cloud services at IU, see Store and share your individual files at IU.

The Boot Camp Assistant will help guide you through the process of adding Windows to your Mac.

  1. For an easy way to begin, click , the Spotlight icon. In the search bar, type boot camp assistant, and press Enter.
  2. The next screen describes what Boot Camp assistant does, and warns you to back up your disk if you haven't already done so. Click Continue.
  3. To select the installation tasks to complete, make sure Create a Windows 7 or later version install disk and Install Windows 7 or later version are both selected.

    Before continuing, make sure a USB drive (at least 16 GB) is connected to the system, and be aware that the entire contents of that flash drive will be erased.

  4. On the next screen, make sure the ISO file you just downloaded from Microsoft and the appropriate flash drive are both selected. Click Continue.
  5. To confirm that the drive will be overwritten, click Continue.

    This step will take some time, depending on your computer's hardware capabilities and your internet connection speed. Make sure your computer remains plugged into an AC outlet during this process.

  6. To begin creating a partition on your Mac's hard disk to hold Windows, authenticate with your administrator password.
  7. Use the slider between the Mac and Windows icons to select a size for the Windows partition.

    UITS recommends that you use 80 GB for just Windows, and 90 GB for Windows plus Microsoft Office.

  8. Click Install.

    This process will take several minutes to complete. Once the partition is created, your Mac will restart and begin installing Windows 10. You may be prompted several times for your administrator password.

Step 6: Install Windows 10

Follow the Windows installation wizard to begin installing Windows. You'll be prompted with several questions about how to configure Windows for your needs.

These steps will take some time, depending on your computer's hardware capabilities. Make sure your computer remains plugged into an AC outlet during this process.

  1. Select the language, time and currency format, and keyboard or input method for Windows. Click Next.
  2. On the next screen, enter the product key you got from IUWare.
  3. Choose the version of Windows that the product key unlocks (Windows 10 Education) and click Next.
  4. Read and accept the license terms, and click Next.
  5. Choose the partition on which Windows will be installed, called 'BOOTCAMP'. Click Format.
  6. To confirm that you wish to format the partition, click OK. To continue, click Next.
  7. The installer will copy Windows files and install any features and updates required. When prompted, click Restart Now to restart your Mac and continue the Windows Installation process.

Step 7: Configure Windows 10

After Windows restarts, you'll need to do some configuration.

Microsoft's digital assistant, Cortana, will help guide you through this process. If you are wearing headphones, remove them while your computer is restarting. Until you can install the Boot Camp support software, you may not be able to control the volume of Cortana with the volume keys on your computer.
  1. To select the appropriate region, choose United States, and click Yes.
  2. To select the keyboard layout, make sure US is selected, and click Yes.
  3. If you would like to add a secondary keyboard layout, use the next screen to do so; otherwise, click Skip.
  4. On the 'Let's connect you to a network 'screen, click Skip for Now.

Step 8: Create your Windows administrator account

The Windows administrator account you create should not be an account you use for general use of this computer.
  1. To create your account, type your name and click Next.
  2. Type a password and click Next. Do not use your IU network passphrase.
  3. Confirm your password by typing it again, and click Next.
  4. Select a series of three security questions, clicking Next after each one.
  5. Decide whether or not you want to use Cortana in Windows. Decide what privacy settings you would like to enable or disable, and click Accept.

Windows will do its final configurations. This step will take some time, depending on your computer's hardware capabilities. Make sure your computer remains plugged in to an AC outlet during this process.

Macos Boot To Usb

Step 9: Install support software

Once Windows has started (may take some time), the Boot Camp installer will walk you through installing Apple's support software.

  1. To begin the process, click Next.
  2. Read and accept the license agreement, and click Install. All the Apple-specific software you need to run Windows efficiently on your computer will be installed.
  3. When the installer finishes, click Finish.
  4. To restart the computer, click Yes.
  5. When the computer restarts, click the trackpad or press any key to display the login field. Log in with the password you created earlier in the configuration process.

Step 10: Configure Windows Wi-Fi settings

  • To connect to a wireless network, in the system tray at the bottom right of the screen, click the Wi-Fi icon.
  • If you are off campus, connect to the wireless network you expect to use in your location. If you are on campus:
    • eduroam:

      The simplest and most secure way to connect to eduroam is to use the Eduroam Network Setup Tool. Alternatively, you can use the instructions below to connect manually.

      To connect manually, select eduroam from the list of available wireless networks, and enter your full IU email address (for example, [email protected]) and passphrase.

      • If you connect to eduroam at an institution other than an IU campus, you'll need to use the IU VPN to access some resources (such as remote desktop, library resources, and department drives).
      • For troubleshooting tips, see Troubleshoot your eduroam connection.
    • IU Secure: To connect, select IU Secure from the list of available wireless networks, and enter your IU username and passphrase.
    Macos boot usb windows

    You have finished installing Windows on your Mac. If you need to install Microsoft Office, see About Microsoft 365 at IU.

    Step 11: Configure the default boot operating system

    You have the option to boot to either Windows or macOS when starting your Mac. You can also select one operating system for the computer to start by default.

    1. To shut down your Mac while you're in Windows, from the Start menu, click the Power button, and then click Shutdown.
    2. To boot into macOS, with the power off, press and hold the Option key and power on your Mac.
    3. Hold the Option key until you see two hard disk icons and a Wi-Fi network selector. Boot into macOS by clicking Macintosh HD (you'll select the default boot operating system momentarily).
    4. From the Startup Disk control panel, click the Apple menu. Click System Preferences, and then Startup Disk.
    5. To unlock the settings, click the Lock icon, and then type your administrator passphrase.
    6. To select the default boot operating system, click the disk that correlates to the operating system you would like to select. For macOS, choose Macintosh HD; for Windows, choose Bootcamp. If you would like to boot into the selected operating system now, click Restart.

    Switch operating systems

    Whenever you would like to switch operating systems:

    1. Shut down the computer.
    2. Press and hold the option key and power on your computer by pressing and releasing the power button.
    3. When you see two hard disk icons, release the option key.
    4. Click the hard disk icon that corresponds with the operating system you would like to boot. For macOS, choose Macintosh HD; for Windows, choose Bootcamp.

    Get help

    For help, contact your campus Support Center.