Open Boot Camp Assistant in the Utilities folder and download the current Windows Support Software from the “Action” dropdown in the menu bar. Quit Disk Utility after this operation completes. In Disk Utility, format the Flash drive as exFAT.Insert an 8GB or larger flash drive into a USB port on the Mac.The USB Flash drive must be formatted as exFAT. It is important to use this Mac since it will be used to identify the correct Windows drivers. Windows 10 Installer ISO for Windows 10Īll the preparation is done in macOS on the Mac that is having an issue booting Windows.USB Flash drive (8 GB or larger recommended).It is relatively straightforward to create a bootable USB Flash drive to boot to the Windows 10 installer and open up a DOS prompt for troubleshooting. To troubleshoot an issue with Windows 10 (especially boot-related issues), it can be handy to boot into Windows 10 not installed on a Boot Camp partition.
