Also because you are on the Mac, you can create ringtones using Garageband. If you have
a DRM-free mp3, just open up it in Garageband and edit the track in any way you choose. When you are completed simply export it to iTunes. Make sure
it is saved in the mp3 structure. There are directions on numerous websites on how to use Garageband for this objective. Or worse yet; you're led to believe if you participate in lookup-engine, or pay-per-click hocus-pocus that's all you'll at any time require to do.