you are running 10.7?
There are direct downloads.
8.1 is a nice improvement over 8.0 and you probably need BC 5.x
Boot Camp: Frequently asked questions about installing Windows 8
SummaryLearn more about how Mac computers can run Windows 8 using Boot Camp 5.
Boot Camp, Windows 8
General installation questionsWhat is Boot Camp 5?
Boot Camp 5 is not a release of OS X software. Rather, it is a release of the Windows Support Software (drivers). You will need to use this software on your Mac with Windows 8 or Windows 7. For more information on Boot Camp 5, see thttp://support.apple.com/kb/HT5639
Which Macs support Windows 8?
- MacBook Air (Mid 2011 or newer)
- MacBook Pro (Mid 2010 or newer)
- Mac Pro (Early 2009 or newer)
- Mac Mini (Mid 2011 or newer)
- iMac (27-inch, Mid 2010 or Mid 2011 or newer)
For more information, see this article.
What are the System Requirements for Windows 8?
Please see this article.
How can I install Windows 8 on an eligible computer?
Use the Boot Camp Assistant. The assistant will partition your internal hard drives and install Windows 8. For more information on Windows 8 installation, see the Boot Camp Installation & Setup Guide.