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You can manage the license on their dashboard. If I remember correctly, you can also enter a license already used and have the app disable the license in the other location.
Parallels is cheaper than VMware for sure, but the company is focused on macOS and maintained with frequent updates. They need to pay developers.

You can say that is not really useful for a MacPro5,1, but how can something be cheaper than free?

Both VMware Fusion and Workstation are now free for personal use.
 
You can manage the license on their dashboard. If I remember correctly, you can also enter a license already used and have the app disable the license in the other location.
Parallels is cheaper than VMware for sure, but the company is focused on macOS and maintained with frequent updates. They need to pay developers.
You're right about the Parallels license - I just gave it a try. I just put in my existing serial number, and I got a dialog saying it would disable the license on the machine to which it had been previously installed. I had no idea it worked that way. It sure makes it a lot easier to try it out on different computers, or just to re-install it if I rebuild a machine from scratch. Thanks for the suggestion!
 
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