Note: By default, the Install OS X Mountain Lion application can be download from the Mac App Store if you have already purchased the upgrade.
To install Mac OS X 10.8 in a virtual machine using the Mountain Lion app download:
After the installation completes, VMware Tools must be installed in the virtual machine. To do this, first eject the Mac OS installation disc image from within the new virtual machine. For more information, see Installing VMware Tools in a Mac OS Guest (1032440).