Plex is the best media centre for Mac and is based on the XBMC, with that, the latest updation of the application that offers you hardware acceleration has better metadata and has Mac device. The Plex is one of the excellent and best media centres available for Mac PC and is also used as a client-server model. Once you've picked which hardware you're going to use, download the Plex Media Server application.If you haven't created an account yet, now's a good time to do so. You'll see a drop-down menu.
I swiped the following from the Plex Forums
Plex Server For Mac
Delete Plex.app from your Applications folder and delete the following:
/Users/[YOUR USER]/Library/Application Support/Plex Media Server