I am pretty much in the same situation as the original poster in that as a recent Mac adopter, I don't know very much about terminal etc so your response is very welcome.

Some additional questions.

1. In the example you gave (Point 4) was is the step if the file not on the desktop. How to you specify the path to it.

2. The main reason I am interested in this tool is that I want to create Exif data for TIFF files from a scanner. Is this possible?

3. If it is, can I write into the exposure fields such as shutter speed, Aperture etc. I have scans using a Minolta Scan Dual III and have all the exposure data for each shot as I used a Minolta Dynax 7 that allows me to output text files with this data.

4. I have checked and know that the file properties section of my scanned files do not have fields for aperture etc. Is it possible to create these fields in a TIFF files that doesn't have one? Perhaps transfer from one image that has then to these ones?

5. I noticed that some other post had something about lenses from the Minolta Dynax 7D. I am a hybrid shooter as in addition to the Dynax 7, I own a Minolta Dynax 7D and a Dimage A2. Are the raw files from these units supported?

Sorry for the number of queries and thanks for your assistance.