I have Mac Pro 1,1 (2006 version) running Lion 10.7.5. Bootcamp on this model officially supports up to Windows 7 x86 though people have reported being able to run Windows 10 x64. I downloaded a Windows 7 Pro x86 ISO and checked its integrity by creating a virtual machine and getting it to load the installer. Then, I burned the ISO to DVD on a Windows 10 PC. The DVD is detected on my MacBook (7,1 running a Mojave patch) but not on the Mac Pro. The Mac Pro DVD drive works since it can play movies and load other software install DVDs. Could someone explain why this isn't working and how to get this model to load a Windows installer?
I tried a bootable USB but the default boot loader wouldn't detect it. I tried refit as an alternative boot loader but it still didn't work. I tried creating a bootable USB from within the Mac Pro OS by editing the flags of supported USB boot models to get the "create USB install disk" option to appear in the boot camp installer. It still doesn't work.
I tried enabling access to an external Apple "superdrive" and performing the normal terminal patch to get it to work. The external superdrive spits out discs.