Mac OS X,  VMware

Headless VMware Fusion

You can run VMware Fusion 2 in what is commonly referred to as headless mode. This option is not yet available in Fusion 3, but is handy when you do not want to authenticate at the loginwindow of Mac OS X in order to run virtual machines using the vmware-vmx process. To enable headless mode, first run the following command:

defaults write com.vmware.fusion fluxCapacitor -bool YES

You will then see a Headless option in the View menu. You can toggle it on and off there. If you wish to to then disable headless mode:
defaults write com.vmware.fusion fluxCapacitor -bool NO
While you are in headless mode, you will find it useful to have a way to see the guest OS. You can so so by editing the .vmx files and inserting the following lines in there, which then enable VNC for the virtual machine:
RemoteDisplay.vnc.enabled = “TRUE”
RemoteDisplay.vnc.port = “5901”