Boot Camp Control Panel User Guide


The steps for installing Windows on an external drive is a bit more involved than it is on an internal drive. How to Use Boot Camp on an External Drive to Run Windows on a Mac Boot Camp and Boot Camp Assistant allow you to install Windows on your Mac. Also, both drives appear as NVMe drives. Otherwise, macOS can be installed on an USB external drive. The Boot Camp assistant can not be used to install Windows on a external drive. Installing windows manually can not be done on an external USB drive by just using the Windows installer GUI.

After you use Boot Camp Assistant to install Windows on your Intel-based Mac, you can set the default operating system to either macOS or Windows. The default operating system is the one you want to use when you turn on or restart your Mac.

Set the default operating system

  1. In Windows on your Mac, click in the right side of the taskbar, click the Boot Camp icon , then choose Boot Camp Control Panel.

  2. If a User Account Control dialog appears, click Yes.

  3. Select the startup disk that has the default operating system you want to use.

  4. If you want to start up using the default operating system now, click Restart. Otherwise, click OK.

You can’t change your startup volume to an external drive while you’re using Windows.

Macos bootcamp external drives

To learn how to change the default operating system using macOS, see Get started with Boot Camp.

Restart in macOS

In Windows on your Mac, do one of the following:

  • Restart using Startup Manager: Restart your Mac, then immediately press and hold the Option key. When the Startup Manager window appears, release the Option key, select your macOS startup disk, then press Return.

    If you’re using a Mac notebook computer with an external keyboard, make sure you press and hold the Option key on the built-in keyboard.

  • Restart using Boot Camp Control Panel: Click in the right side of the taskbar, click the Boot Camp icon , then choose Restart in macOS.

    This also sets the default operating system to macOS.

For more information about restarting in macOS, see the Apple Support article Restart your Mac in macOS or Windows.

See alsoGet started with Boot Camp Control Panel on MacTroubleshoot Boot Camp Control Panel problems on Mac
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  1. A 2GB or larger USB flash drive: The flash drive is used as a bootable Ubuntu installer that contains not only the basic installer but also a live version of Ubuntu. This version can run directly from the USB flash drive without modifying anything on your Mac. It is a great way to test whether your Mac and Ubuntu can get along.
  2. If you have already installed Windows 10, Windows 8.1, Windows 8, or Windows 7 on your Mac using Boot Camp, you can set Parallels Desktop to run Windows from the Boot Camp Partition or import Windows and your data from Boot Camp into Parallels Desktop as a new virtual machine.
DVD installation - Live CD installation - Live USB stick - Network installation - Remote installation - Partitioning - Installation help - Download help

At the Drive Properties window, select your USB drive in the Device field, if it's not already selected. Click the Select button next to the Boot selection field and select your Windows 10 ISO file. Now, import DMG file and click Burn button to burn macOS dmg file to USB drive. Lastly, plug the USB drive into Mac and press Option key to select the drive from startup menu. From there, you can start installing macOS from bootable USB drive. My Testing Environment: Windows 10 Home/SanDisk USB 3.0 64G/macOS Mojave & Catalina DMG File.

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This page explains how to create a bootable USB stick in a Linux System. There are dedicated articles about how to Create a Live USB stick using Windows™ and Create a Live USB stick using macOS

Version: 12.2+This applies to openSUSE 12.2 and later.

Warning: The instructions on this page will destroy all data currently on the USB stick being used. Please be certain it does not contain important information.
Warning: Do not try to apply procedures found on the internet for other distributions to convert the images into bootable sticks (unetbootin). Doing that will break the images. The openSUSE images are already prepared for being used directly on usb sticks, and can persist filesystem changes without further steps.
  • 3Using SUSE Studio Image Writer
  • 5Using commandline tools
  • 6Optional steps
  • 7Troubleshooting

Download the latest openSUSE ISO file

See as of Nov 2019, this repo keep all the Leap versions (since 42.2 to 15.2), following the links lead to a repo 'live' with live isos.

Official URL:

Backup your USB drive

You could, if you prefer, make a backup image of the stick prior to using it for installation, with dd, and recover it after the installation. [Detailed instructions needed]

Using SUSE Studio Image Writer

These a general instructions to write an hybrid iso dvd to an usb device.

Install ImageWriter for openSUSE

Install SUSE Imagewriter with 1-Click Install

For openSUSE 15.1:

For openSUSE 15.0:

For openSUSE Leap 42.3:

For openSUSE Tumbleweed:

Or you can use this command as a root to install Imagewriter.

Write ISO to USB

  • Start SUSE Studio Imagewriter from the start menu.
  • The image writer needs root permissions. So enter the password for root when prompted.

  • Open a file manager application.
  • Navigate in the file manager to the downloaded ISO file.

  • Drag&Drop it to the Imagewriter.

  • Plug your USB memory device in your computer.
  • Select it from the dropdown menu at the bottom corner of Imagewriter.

Confirm overwriting your data on the USB device by clicking OK.

Writing the data takes a few minutes. After that your openSUSE bootable USB device is ready!

Using live-fat-stick, live-grub-stick, live-usb-gui (Command line or GUI way)

Boot Macos From Usb Drive

If you'd rather not reformat the USB device and keep the ability of putting files on it and accessible by other operating systems, you have the option of using the live-fat-stick or live-fat-stick scripts from command line or live-usb-gui point and click graphical interface. You can put ISO on vfat partitioned USB stick or hard disk.

On openSUSE you can install the packages simply via yast (Leap 15.1) or via 1-click from here live-fat-stick, live-grub-stick and live-usb-gui, if you are running any other distribution, get the scripts from here and make it executable(as root, with chmod +x /usr/bin/live-fat-stick) after copying it to /usr/bin/, make sure you have syslinux and gpart installed before running it.

Run the following as root (with su -, not using sudo) in terminal to get the USB device path:

Mac Os Boot From Usb Drive

Run the following to make USB stick with vfat(fat32) partition bootable with iso copied on it:

# live-fat-stick --suse /path/to/openSUSE-filename.iso /dev/sdXY

To make USB device bootable with EFI(Secure boot capabilities) wiping all data from it, run:

# live-fat-stick --isohybrid /path/to/openSUSE-filename.iso /dev/sdX

For more help, run:

Use live-grub-stick command in place of live-fat-stick as shown in above examples if you wish to create bootable usb sticks formatted in any file systems supported by grub2, for example you can use ext3/ntfs formatted stick to create bootable USB from standard openSUSE installation iso, this allows the use of remaining space for putting other iso images or data.

Multiple iso images from multiple distributions can be added to the USB device with vfat partition when not using 'isohybrid' option, boot menu will offer a choice of distribution to boot from. Scripts does not format or remove data from the device.

Mac Os X Boot From Usb Memory Stick

Using commandline tools

Download LiveCD ISO

Download the installation image of your choice from

Verify the integrity of a downloaded image:

$ gpg --recv-keys 9C800ACA
$ wget
$ gpg -a openSUSE-13.2-GNOME-Live-x86_64.iso.asc

Find Block Device

Boot Imac From Usb Hard Drive

After inserting your USB stick, you can find out what device it is:

# grep -Ff <(hwinfo --disk --short) <(hwinfo --usb --short)

Write ISO to USB

Finally, once you've found your block device, write the image to it. Point 'dd' to the full path such as '/home/user/Downloads/openSUSE-13.2-GNOME-Live-x86_64.iso' or change directory (example: cd ./Downloads) to where the image is contained.

If you get the message

your dd version does not support the status=progress option and therefore you have to remove it (and you will miss the writing progress indicator).

Optional steps

How to recover the USB stick for 'normal' use again

After system installation, you may want to reuse the stick as you would normally to write things on it. In that case you have to reformat it. Often people complain that Windows fails to do it.

Typically, you would simply start fdisk:

and select:

Mac Os X Boot From Usb Drive

and then:

(primary, number 1, default size to use the entire device)

Use type 6, FAT16


This last step is necessary, particularly the -n SOME_NAME, or the USB stick will mount with the iso name.

And done. Or, you could use gparted for partitioning and formatting.

Macos Catalina Bootcamp External Drive

If that doesn't work try the following steps with extreme care:

If you look at the 12.3 DVD image on a USB stick with fdisk, you would see something like this (notice the GPT warning):

So, before reformatting, you have to repartition it again. And sometimes, if this fails, you may need an extra step - because software thinks the stick is a CD and thus not writable:

Macos Bootcamp External Drive Software

Notice: all these instructions assume the stick device is /dev/sdX. You have to find which is yours (see “Find Block Device” section above). An error here will destroy some other disk in your system.

That destroys the boot sector, partition table, and initial structures. Any operating system should be happy to reformat it again.


Macos Bootcamp External Drive Download

How to make a USB drive bootable

Imac Won't Boot From Usb Drive

This situation would happen very rarely, but in the event that your computer doesn't boot from the LiveUSB/DVD from the steps above, you might try the following procedure.

Open a console and do the following as root:

See also

Macos Bootcamp Windows External Drive

External links

Macos Bootcamp External Drives

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