First of all, we are not talking about the bottled beverage which is famous around the world but we are talking about the famous linux software wine which is used to run the windows applications on linux. Similar to wine, there is a new project started which is trying to emulate the layer for OS-X applications. Though there are almost all the OS-X applications have an alternative in linux but some user just wants to use the original apps as they are comfortable with those. Here is the project page.
Basic execution is similar to wine though the projects also aims to provide ABI compatible set of libraries and framework as available in OS-X. Project is in very initial steps.
Different Universe 