I have managed to get my gtx 660 detected and automatically installed drivers. Also under display manager it shows "working properly". However every time I clicked Nvidia control panel, I get this message,"you are not using a display attached to a Nvidia gpu". I thought this might be a problem with using internal screen. Could someone send me a modified nvam.inf file for gtx 660, as I cannot find it anywhere online. The ones on notebookreview website have all been deleted or set as private. Here's my spec: 2011 Macbook pro 15' i7 2.2ghz 4GB 6750m Thanks.