I think haze9899 doesn't have any troubles downloading the save file to his Mac, but rather having difficulties on getting the save file from the computer to the VMU of the Dreamcast. The latter is equally tiresome for both Mac and Windows users.
But instead of downloading a save file from the WWW to your computer, I recommend DL'ing (or buying) the capcom fan disc or famitsu dreamcast vm data issue. Or download the http://www.bucanero.com.ar/2005/08/12/v ... p-cd-v130/
and get the save file from there straight onto your Dreamcast.
This does introduce a new question, how to burn Dreamcast images with a Mac