When finished, the root folder of the USB flash drive should appear as shown below. Use the Finder application to copy the contents of the ISO file to the USB flash drive. The volume name, when mounted, was CCCOMA_X64FRE_EN-US_DV9. The name of the ISO file, I downloaded, was Win10_1809Oct_English_圆4.iso. Use the Finder application to mount the ISO file. Choose Name, Format and Scheme as shown in the image below. Use the Disk Utility application to erase a 16 GB or larger USB flash drive. After the download finishes, the Window Support Software folder should appear as shown below. Look for Download the Windows Support Software under Action on the Menu Bar.

Use the Boot Camp Assistant application to download the Windows Support Software. For now, you can use the following steps to create a USB Windows 10 flash drive installer.ĭownload the Windows 10 October 2018 Update ISO file from the Microsoft website Download Windows 10 Disc Image (ISO File). So, Apple could fix this problem by changing to Boot Camp Assistant to format the USB flash drive as ExFAT instead of FAT32. Mac computers running High Sierra or Mojave may be able to boot from USB flash drives that are ExFAT formatted. Here are three potential ways to create the USB installer. I have found that after upgrading to High Sierra, my 2013 iMac could boot the Windows 10 installer from a ExFAT formatted USB flash drive.