Can't add serial code/activate VMware
Solution 1:
Open up terminal and use this command.
replace INSERT_YOUR_KEY_HERE with serial number provided to you by vmware
sudo /usr/lib/vmware/bin/vmware-vmx --new-sn INSERT_YOUR_KEY_HERE
Solution 2:
For VMware Workstation 9 - you can run:
sudo /usr/lib/vmware/bin/vmware-enter-serial
and enter serial into popup