I have a Dell Photo 964 printer and want to know how to down load it onto my Mac Book Pro

Hi Jane...

Go to the Dell website and download the drivers (software) for Mac O S X 10.7 for the 964 model.

Then open System Preferences > Print & Scan > Print

Click + to add the printer.

This won't work. Dell does not supply drivers for Mac, but Lexmark has similar model and will work for you. Download (or install) Lexmark P4350 series to get it work.