What software are you using? Apple Photos? Photos (and Aperture and iPhoto) do NOT make any changes to the images downloaded from the camera. If you are shooting in RAW + JPEG, Photos will show only the JPEG by default, but the RAW is still there. I...
Are you looking to import into Aperture/Photos/Lightroom, or download the images directly to your hard drive? Pretty much all you need to do to import is connect the camera via USB and choose import in Aperture/Photos/Lightroom. Alternatively, you ca...