Redeeming a VMware Fusion Pro 12 Mac OS key is really simple, just follow these steps: 

1. Download the trial version from this site: LINK
2. Enter and activate the key in the application after downloading.

The key is not working  

If you have activated the key according to the guide but the code appears not to work, please check what type of error message you receive and depending on it follow the appropriate instructions:

• My key is Duplicated / Already used
• My key is Invalid
• My key is region locked / can't be activated in my country
• My key activated a different product
• My key did not activate all of the content