MacOS X
From AMule Project FAQ
(Redirected from MacOSX)
MacOS X is a UNIX-based operating system developed by Apple. Officially, it is called Mac OS X, but it is common to see it referred to as MacOS X or even MacOSX.
More information about this operating system can be found at Wikipedia's Mac OS X article.
NOTE: aMule is a separate project and is not related to Mac OS X in any way.