We suppose Apple will not like that, but Oracle’s latest version of VirtualBox 3.2 Beta 1 now supports virtualization of Apple’s Mac OS X.
Although Apple’s license agreement clearly prohibits installing Mac OS X on other hardware than Apple’s, the screenshot shows that even the Windows version of Mac OS X is prepped to run Mac OS X as guest operating system.
On the other hand Apple’s license agreement is not valid in all countries. It cannot be applied in Germany and some other countries for example.
To satisfy Apple’s Aqua binary encryption it is required to supply two operating system decryption keys (OSK0 and OSK1) to the kernel extension “Dont Steal Mac OS X.kext”. Although it is no secret that Mac OS can be run on PC hardware using decryption emulators like netkas’ fakesmc.kext, anyhow at the moment it is unclear if Oracle integrated those operating system decryption keys into VirtualBox.
VirtualBox does not circumvent Apple’s binary protection. A VirtualBox developer confirmed, that Apple hardware is required in order to run Mac OS as guest in VirtualBox. So without tempering either with VirtualBox’ EFI or with Mac OS X it is not possible to run OS X in VirtualBox on a PC.