When you start Parallels Desktop for Mac, it will prompt you to register your activation key. A license key for the Business Edition cannot be registered during the standard registration process, so you need to click on the Business Edition button at the bottom of the registration window to skip this step and proceed to activation.
Please enter your activation key (dashes will be added automatically).
Once you enter the key, it will be validated. If the key is valid, it will be marked with a check mark.
Note: An Internet connection is required for activation of the Business Edition.
If the key is not valid, it will be marked with a red cross sign.
Check to see if you entered the key correctly.
If the key has been successfully validated, click Activate.
If your Mac is connected to the Internet, Parallels Desktop Business Edition will be successfully activated.