I got a Mac last month. When I plugged in my iPad to transfer movies on to it and export photos off of it, I noticed garage band was added to my iPad. I guess this comes free with Macs and automatically uploaded the app. I love it, but my brothers and mom also want the app on their iPads. Can I plug in their iPads into my Mac and also let them download the app for free? Or would there be something that doesn't allow me to do that? Thanks.