Greetings, Thank you for your feedback. If you would like to use your Parallels Desktop for Mac Standard or Pro Edition license on a new Mac, you should just download Parallels Desktop on the new Mac, install it and activate the product as described in KB 124225. Upon activation on the new Mac you will see a warning that the license is already in use > Click on Activate on This Mac and the current copy will be successfully activated. As a result, the license will be automatically deactivated on the old Mac. Best regards!