Did you look into garagesale? it's a listing program for macs. I like it so far.
http://www.iwascoding.com/GarageSale/
It is time to learn to put pictures in your auctions by using a host. You will need an FTP that works with the Mac to upload your images to your host site. One such program is Fetch and go can get info on it here:
http://fetchsoftworks.com/
http://www.equinux.com/us/products/isale/ftpmac.html
http://www.equinux.com/us/products/isale/ebaycertified.html
