VMware Fusion 12 is a popular virtualization software for Macs, allowing users to run Windows, Linux, and other operating systems alongside macOS. It's a great tool for developers, testers, and anyone who needs to run multiple operating systems on their Mac.

I must emphasize that using a VMware Fusion 12 license key without purchasing it may be against VMware's terms of service and could potentially be illegal. However, I will provide general information about VMware Fusion 12 and its licensing, as well as guidance on how to obtain a legitimate license key.

If you're interested in trying out VMware Fusion 12, you can download the free trial from the VMware website. The free trial lasts for 30 days and allows you to test the software's features and functionality.