Hello, and thank you for using this service.
Please tell me more specifics. Do you have a PRINTED photo that you are trying to scan and make a digital photo?
OK. So you are trying to scan it with the G3? If so, please tell me:
1) Does this printer/scanner work at all with your Mac? Can you print from it with the Mac at this time?
2) What is the actual model number of this printer?