According to this document - Boot Camp: System requirements for Microsoft Windows operating systems - Apple Support - my late 2014 iMac 27" Retina 5K can only retrieve the Windows support software for my Windows 7 installation via BCA. This machine does not have a DVD drive, I do not have an external hard drive, so my remaining option is to install via USB flash drive. I have tried three separate flash drives, so I'm pretty sure they are not the issue. I have an ISO of my Windows 7 installation disk.
Using BCA, I select "Create a Windows 7 or later version install disk", which also checks the option to "Download the latest Windows support software from Apple". The creation of the bootable flash drive always succeeds, but BCA always stops (I've tried a dozen times) when it begins trying to download the Windows support software. I have let it run overnight, while I'm work, etc. No amount of time produces any progress. As a last ditch effort, I stopped the process the last time I tried, and downloaded the latest manually-downloadable support software I could find (BootCamp5.1.5640) from Apple and manually placed it on my flash drive as instructed. I then ran BCA and selected only to "Install Windows 7 or later version". Windows installed fine, but at a certain point at the end of the installation, I received a message stating that this version of Boot Camp was not appropriate for my model iMac, which I expected would happen.
So.... if there is no manual download for the support files for my machine, and BCA absolutely refuses to retrieve the software, what options am I left with?
iMac with Retina 5K display, OS X Yosemite (10.10.1), null
