I'm on an early 2008 Mac Pro trying to install Windows 7. Bootcamp says the compatibility files are unavailable for download. The 2nd option to install says it can't find the Windows DVD (I'm using USB via the official Microsoft tool) I tried holding down the option key to boot directly off the USB stick but it's not showing up there either, but it's fine once inside Mavericks. I also tried using 3rd party software for transferring the ISO to USB. I almost just want to take the HD out, put it into a PC, install W7 that way and pop it back in.