Wine is a recursive acronym that stands for Wine Is Not an Emulator.
OS X is POSIX-compliant, too (it's Unix underneath all of Apple's gleam, after all), so Wine will run on the Mac also. It's called The Wine Project, and the effort continues to this day. More than 20 years ago, a project was started to enable Windows software to work on POSIX-compliant operating systems like Linux. The Mac isn't the only computer whose users have wanted to run software designed for Windows.
