PhotoME won't work on the OP's Mac. What is needed is a free download of
Graphic Converter. Download and install GC, then open an image shot with your K200D and open the "Show Information" window. Click the ExifTool tab and scroll down until you find the "Shutter Count" listing. You may need to download and install
ExifTool if the tab is not available in the GC info window. (ExifTool can do this alone but it's a command line tool and I was never able to figure it out).
NOTE: The best way to ensure this works is to open an image (RAW or JPEG)
directly from the SD card so as to ensure the shutter count data is not overwritten by a 3rd party application during download to the computer.