Do you search an eBay listing software for mac? Maybe GarageSale is the most famous tool for mac users. It is download style program. The screenshot looks like iTunes and it has a lot of features.

You can also use ListersIn with Safari browser on Mac. The screen looks like following screenshot.

Currently usage browser share of Safari on my site is very small.

Browser Share
Chrome 38.31%
Firefox 32.25%
Internet Explorer 23.60%
Safari 2.58%
Opera 2.13%
Android Browser 1.01%
Mozilla 0.11%

I hope that mac users find this seller tool and use this!