Mac OSX as a guest

Is it true that you can't install OSX (not server) as a guest? Why is that? Are there technical problems to make this happen or am I missing something?

/Thanks, Michael

 

http://kb.parallels.com/en/5656

 

i clicked on this link and it says cant see internal messages ?

 

As Apple EULA claims:

This License allows you to install and use one copy of the Mac OS X Server software (the "Mac OS X Server Software") on a single Apple-labeled computer. You may also install and use other copies of Mac OS X Server Software on the same Apple-labeled computer, provided that you acquire an individual and valid license from Apple for each of these other copies of Mac OS X Server Software.

You can install in Virtual Machines only Mac OS 10.5 Server edition.

 

it's a legal issue, Apple doesn't allow OS X Guest to be installed on a virtual machine, only allows OSX Server.