Upgrading to VMware Fusion requires a valid 25-character VMware Fusion serial number. If you do not have one, during installation you can purchase an upgrade key here.

VMware Fusion Serial Numbers 

Buy a Fusion Serial Number

Purchase a serial number from the online store and install in the “VMware Fusion > Licensing” menu when you’re ready to license your copy of VMware Fusion.  

Buy VMware Fusion

Buy a Fusion Pro Serial Number

Purchase a serial number from the online store and install in the “VMware Fusion > Licensing” menu when you’re ready to license your copy of VMware Fusion Pro.

Buy VMware Fusion Pro