If you never edit the configuration file by hand and do not remove the virtual Ethernet adapter, these settings remain untouched. You also need to be sure not to change certain settings in the virtual machine's configuration files. Moving it to a different host computer or even moving it to a different location on the same host computer changes the MAC address. To avoid changes in the MAC address automatically assigned to a virtual machine, you must not move the virtual machine's configuration file. In addition, VMware Workstation does its best, but cannot guarantee, to automatically assign unique MAC addresses for virtual machines running on multiple host systems. In most cases, the virtual machine is assigned the same MAC address every time it is powered on, so long as the virtual machine is not moved (the path and filename for the virtual machine's configuration file must remain the same) and no changes are made to certain settings in the configuration file. The software guarantees that virtual machines are assigned unique MAC addresses within a given host system. A MAC address is the unique address assigned to each Ethernet network device. When a virtual machine is powered on, VMware Workstation automatically assigns each of its virtual network adapters an Ethernet MAC address. Maintaining and Changing the MAC Address of a Virtual Machine
