Are you looking to an older version of Parallels, or are you setting up a new Mac for the first time?
Usually, no. Version 18 keys do not work on Version 19 or 20. Parallels usually requires a paid upgrade for major yearly releases. parallels desktop keys
However, a quick Google search reveals a dark underbelly of the software world: thousands of results for “Parallels Desktop keys,” “free activation codes,” or “cracked licenses.” Are you looking to an older version of