Running Harry Potter and the Prisoner of Azkaban on a modern Mac is challenging because the game was originally designed for older Windows (98/XP) and PowerPC-based Macs. It is not currently available for official digital purchase.

Porting Kit (from Paul the Tall) uses Wine technology to wrap Windows games into native Mac apps.

Features a pre-made "port" for this specific game. You simply download Porting Kit, search for the game title, and it automates the setup using your game files. Option 3: Emulation (Console Versions)

To get the game running today, you typically need to download the original game files from preservation sites and use a compatibility layer or emulator. Harry Potter and the Prisoner of Azkaban - Old-Games.RU

While there was never an official digital release for Mac, you can still play Harry Potter and the Prisoner of Azkaban