So from these programs (the apple cloud, onedrive, google drive, etc…), I use Dropbox and I have all my attached pdfs store on it. Currently, I am using EndNoteX7. I’ve used volatile application and I think it would be great if I can run endnote from Dropbox for example. The only issue will be OSx compatibilities. Though, I think I could help if you need more suggestoins or let me know if this solutio exists.
Rodrigo Perea