After the initial excitement regarding the ability to install Mac OS X Snow Leopard client (or older Mac OS X client), VMware clarifies that only the following Mac OS X are supported to run in VMWare Fusion 4:
- Mac OS X 10.5 Server (Leopard)
- Mac OS X 10.6 Server (Snow Leopard)
- Mac OS X 10.7 Client and Server (Lion)
VMware knowledge base also states:
VMware Fusion 4.x includes a check to ensure that the version of Mac OS X being started is one of those listed. Any virtual machine that contains a Mac OS not listed above does not work after updating to VMware Fusion 4.1.1 or later. These unsupported virtual machines no longer boot after upgrading or downgrading from VMware Fusion 4.1.0.
Well, for those who have downloaded VMware Fusion 4.1.0 might want to keep the installer safe, just in case.