I believe we permanently deleted some chats from skype on our macintosh computer. I would like to restore them. Help! How do I do this?

You can't.

There are very few ways to restore deleted data on windows and even fewer (that I know of) on mac. I don't think there is a way to get the data back. Maybe a system restore, returning the system to a previous state, but I'm not a big mac user so I wouldn't know. I think with macs, they introduced a utility called "time machine" with OS X Leopard. So if you have OS X Leopard or newer, this feature might help. But like I said I'm not a mac user, I'm only guessing.

Sorry I couldn't be more help