EXIF Viewer is a small Mac OS X application to display EXIF information in JPEG files coming from digital Cameras. This version is based on Eric M. Johnston's "exiftags" EXIF parsing code --- Please refer to the Readme document provided with the application for the appropriate copyright notice.
Click here to Get EXIF Viewer as a small compressed tarball. It should be automatically unpacked for you after downloading, leaving you with a "EXIF Viewer" folder. If not, double-click to open it (on older systems you might need StuffIt Expander to do this).
One question I frequently get is about EXIF Viewer's ability to retrieve the shutter count. In general I don't know the circumstances under which the shutter count is available in images, and even if so, whether it is reliable. For what seems to be reliable shutter counts for Canon DSLRs, take a look here. I used this once, with the 40D, and it seemed to work.
2.7.1 (10/3/09) Provides a workaround for a Mac OS X 10.6 issue where images cannot be dragged from Safari to the EXIF Viewer app icon in the dock. Note that this is an interim fix and will not work for all image drags from Safari. This interim version has no additional changes and is recommended for SnowLeopard users only.