Apple, in this EULA, is claiming a right not just to its software, but to its software’s output. It’s akin to Microsoft trying to restrict what people can do with Word documents, or Adobe declaring that if you use Photoshop to export a JPEG, you can’t freely sell it to Getty. As far as I know, in the consumer software industry, this practice is unprecedented. I’m sure it’s commonplace with enterprise software, but the difference is that those contracts are negotiated by corporate legal departments and signed the old-fashioned way, with pen and ink and penalties and termination clauses. A by-using-you-agree-to license that oh by the way asserts rights over a file format? Unheard of, in my experience.