Good question - I miss OneNote and intend to try running it under Parallels. Most of the notes stuff is in Evernote now, which is pretty good but nowhere near as good as OneNote. MacJournal could do it too but Evernote runs on my Android phone and Windows and iPad so it's very good for jotting down stuff on the move.

<strong>Update</strong>. Parallels is utterly unusable on an 18 month old MacBook Pro. Waste of money. So slow you wait five minutes or more for OneNote to load. Ridiculous.... Works fine in Boot Camp but that rather destroys the idea. Back to Evernote...