New Bootcamp, Old mac Pro

[towdow3]

I have an 08 mac pro and i'm running el Capitan. i want to bootcamp windows, but it doesn't give me an option to create a boot disk using a usb, nor does it see any of the isos i have on the mac. Can I downgrade to bootcamp 4? Is that something I even need to do? sidenote i ordered a 16gb flash drive to try and use that to make a boot disk.

 

[SoyCapitanSoyCapitan]

You need to burn the ISO to DVD, if not you have to add your Mac model to a file in Boot a Camp Assistant to make it install from the ISO.

http://apple.stackexchange.com/questions/170759/bootcamp-no-iso-option