I have done the same thing and found out that OSX is very hardware specific. So to get the OSX to work you need to adjust the OSX to understand the hosts hardware emulation. You will be able to get it up and running so that the ethernet works and the screen and the rest is very dodgy.
The other problem as that the OSX will not be update-able. As soon as you update the OSX the install will break. The process is a cat and mouse chase of ensuring your updates do not kill the emulators limited hardware.
You'd think that Apples decision to go down the Intel route would make it easier but it doesn't. In the end the emulation will be slow and any advantage that OSX brings will be lost.
There are premade versions that are sold by third party vendors to run on regular hardware but they too will suffer from the issues I have mentioned.