Virtual Box on mac question

Question for anyone who might know....

On my mac i wanted to create a virtual version of osx, but for whatever reason I can't seem to do it. Create the virtual disk, goes to boot up but then says that there's no valid media found. For whatever reason it won't see my osx install disk.

Anyone have any luck creating a virtual osx on their macbook? If so, mind telling me how you did it so i can see what i'm doing wrong?

Thanks

 

I know that use to be the case but sometime in 2010 Virtual Box started letting you run a guest OSX when the host system was a mac itself. The only problem is i can't find anywhere that tells you how to actually set this up

edit: unless of course this has since been changed in releases since, of which I don't know about. In which case, well I'm just SoL LOL