Requires a key for a previous version of Parallels to complete activation .
: Click on Parallels Desktop in the macOS menu bar (top-left) and select Account & License... .
However, I can provide the on how to activate a purchased key for Parallels Desktop.
: Click Enter a key , type your 30-character activation code, and click Activate . Key Types and Management Description Trial
Once you enter the key and hit activate, the software will verify it online. A successful message will appear, and your virtual machine will be ready for use. 2. Activating an Upgrade Key
You must sign in to your Parallels account (or create one) during the activation process to link the license to your identity.