If you do finally get a download, which i assure you you will, I have a mac and have downloaded planty of times. But if you do, all you have to do is click on the "library" section at the top of the limewire window, and your download will appear there. Click on the now downloaded file once, then take your mouse down to the bottom where it says "load" and click on it. your computer will use the apppropriate application to open your file. easy!