start virtualbox in command mode and convert to app in MacOS
start virtualbox in terminal command is VBoxManage startvm VMName.
Create a shortcut in MacOS
run AppleScript Editor
type the below command (WindowsXPSP3Testing is Virutal Machine Name)
do shell script "/Applications/VirtualBox.app/Contents/MacOS/VBoxManage startvm WindowsXPSP3Testing"
File -> Export.. to Application. and change file format to Application
Done! ShortCut created, you can move it to Desktop for use

















