My book studio 3tb wont run on mac mountain lion

[Alucardx23]

Hi, check if the my book appears on the disk utility window.

http://wdc.custhelp.com/app/answers/detail/a_id/866/session/L3RpbWUvMTM1MjMyMjA3NC9zaWQvWEtFN2RJYWw%3D