The following procedure works for all versions of MAMP PRO 1.9.6 and higher. If you have an older version of MAMP PRO update to MAMP PRO 1.9.6.1 and follow the steps 1 - 3.
- Open MAMP PRO.
- Click on MAMP PRO inside the menu bar and chose "About MAMP PRO".
- You‘ll see your license number on the upcoming window.