I used to work this Digital Editions without problems. I don't know if it is the recent updates to Mac OS or something in my schools servers, but I went to download some research ebooks, and was unable to get my Digital Edition to open them because it needed to be licensed (which it used to be). Then it told me it was not able to license under my Adobe ID because it was used on another computer or mobile device (technically both because it was on this computer and my iPad). Eventually I ended up deleting both programs (iPad and computer), reinstalling, re downloading the books, etc. The Mac never asked for licensing, the iPad did, the books will download on the computer, but not sync to the iPad. This is not devastating, but inconvenient. Any ideas?