Hello to you I have the same system as you, with gtx660m card, and it's been almost one year since I regularly try to install OSX, but in vain. Have you ever succeeded, and if so how solution. For now I'm trying with this record: https://osxlatitude.com/index.php?/topic/6182-asus-g75vw/?hl=+asus + G75VW by changing the parameters of the video card ... I hope ...