If Boot Camp Assistant says 'Your bootable USB drive could not be created'

Get help fixing the 'Your bootable USB drive could not be created' and 'There is not enough space available on the disk' message that might appear when you install Windows on your Mac using Boot Camp Assistant.

You might see this error message when the Windows image is too large to fit on the temporary partition or flash drive that Boot Camp Assistant uses to install Windows. For example, Windows 10 Flash install media that's been converted to an ISO file will be too big, because it contains both 32-bit and 64-bit install images.

This error also might appear if you're attempting a new installation using the October 2018 edition of Windows 10 on a Mac that's running an earlier version of macOS. 

To fix this issue, download the Windows 10 April 2018 Update from the Microsoft download page. Then use Boot Camp Assistant to install Windows, making sure to use the April 2018 ISO file. After the installation is complete, you can update to the October 2018 edition using Windows Update.

Learn more

See Install Windows on your Mac with Boot Camp for instructions on installing Windows 10 using an image downloaded from Microsoft’s website.

Information about products not manufactured by Apple, or independent websites not controlled or tested by Apple, is provided without recommendation or endorsement. Apple assumes no responsibility with regard to the selection, performance, or use of third-party websites or products. Apple makes no representations regarding third-party website accuracy or reliability. Risks are inherent in the use of the Internet. Contact the vendor for additional information. Other company and product names may be trademarks of their respective owners.

Published Date: