In Bootcamp I am installing Windows 10. When I select choose ISO Image, the USB that has the image shows in locations. When I select the image it opens up the folder of the ISO. It will not open in Bootcamp. I will have the choice to select from autorun.inf, boot folder, bootmgr, bootmgr.efi, efi folder, setup.exe, sources folder, support folder.
I have tried selecting several of these and some will open in Bootcamp, but all I get is the error "Need 64-bit Windows or 10 or later ISO file". I am sure the file is good I downloaded it from Microsoft and used both their installer and rufus to make 2 files. Both have same error.
I should also point out that I was running Windows 8.1 in Bootcamp and deleted it to do a fresh install of Windows 10. I did use Bootcamp to delete the partition. This is on a Mac Pro 2013