OK, this is going to be a "duh" moment for most Mac developers, but apparently there are some people who are having issues with setting up a test environment in which to run OS X Mavericks. I have to admit that I was one of those who first started asking if anyone was having success running the latest Mac OS in a virtual machine under VMWare or Parallels. There are some people who claim to have OS X Mavericks running fine under one virtual environment or the other, although most are being rather closed-mouth about how they accomplished it. So, tired of waiting, I decided to do what I've done with previous releases and just create a dual-boot machine.
It's stupid easy to do this:
1) On your OS X 10.8 machine, sign into your Mac