Just a quick suggestion for a complicated and expensive, but very useful, Nota Bene. It's not a native MAC app, but comes in a bottled wine version. If I understand it correctly, it is a descendant of XYWrite.
Aimed at scholars, it does more than one series of foot/endnotes; extensive reference lists with notes; two levels of code viewing and editing; outlining; phrase libraries; flexible clipboard; text marking and annotations; academic styles can be switched at will, including notes; an add-on textbase makes tons of files, including PDF, WORD, etc. searchable, and so on, and on. Such a complicated program has glitches, but a prompt and helpful support system.
Its hidden gem is several editing moves that, AFAIK, don't exist in other programs, but that make serious editing easier, faster, and more pleasant, in my experience. Moves like not automatically replacing selected text--so you can see two versions, and reversing letters, words, clauses, and paragraphs. These are options that can be set to standard WORD behavior, but then, why?
Stephen DeGiulio, Ph.D.
Prof. Adult Ed/Engl/TESOL
Director, Literacy Volunteers of Doña Ana County
“Don't limit a child to your own learning, for she was born in another time.”
Rabindranath Tagore (1861-1941)