I use a couple of different Mac apps. First is the Calibre that converts ePub to pdf so I can use the Highlights app for research. That I can then export to Dev

I use a couple of different Mac apps. First is the Calibre that converts ePub to pdf so I can use the Highlights app for research. That I can then export to DevonThink3 for organizing and writing of ideas. My favorite writing app is Scrivener and usually the last in my workflow.