I have a new Macbook Pro. I have an external USB Superdrive. I have a Windows 8.1 DVD and legal product key. I have a blank 8 GB USB Drive.
I'm trying to set up Boot Camp and install said copy of Windows onto my new Macbook Pro. In order to do so, it seems I need to create a USB installer from an ISO of Windows; it won't allow me to just use the DVD. I've found Microsofts site to allow for downloads with a product key, but all require the use of a .exe download manager application that I can't run without another, separate Windows computer available.
How do I make an ISO out of my Windows 8.1 DVD to allow the Boot Camp assistant to create a USB Installer?