What you need to do is this. Do you have Stuffit Expander? If you have it you need to search for Stuffit Expander and open it. Then go under the File menu and come down to Expand. When the window comes up locate "limewire mac.bin" and click choose. If you don't have Stuffit Expander installed you can download it free from the following URL: http://www.stuffit.com/mac/expander/index.html I hope this helps.