I use a Mac with OS Yosemite and borrow books from DRM copy protection from the eLibrary . This worked well until a few weeks ago . But suddenly the Digitial Edition depends always , that is, the book is downloaded , but not complete and Digital Edition unresponsive. We are already translated in the eLibrary link that told us it was up to Apple , El Capitan , but we have not yet downloaded . Apple told us now that lies at Adobe . Can we help someone here ?