MSN Messenger, which was one of the early communication tools from Microsoft, was primarily designed for Windows operating systems. Although there were some unofficial versions and third-party applications that attempted to bring MSN functionality to Mac OS, they were not officially supported.
However, with the evolution of MSN services, especially after the transition to Windows Live Messenger and eventually focusing on Skype, the compatibility with Mac OS improved. Skype, which replaced MSN Messenger, is available for Mac users and provides similar messaging and calling features.
For users who are exploring MSN Hotmail or other MSN services, these are accessible through any web browser on Mac OS. It is advisable to check the official MSN or Microsoft page for the most up-to-date information on service compatibility to ensure that the user has access to the desired features.