Document Imaging Help - Macintosh Users
To view scanned images through the internet, you must have an Imaging program that is capable of viewing .tif files. In many cases, if you're running a Mac system, then you probably have Adobe Photoshop or some other graphics viewer installed. If you do not have a graphics viewer available, here is a free viewer for download.
After you install the viewer you must tell your browser to use that viewer to open these TIFF files and many other file types as well.