I tried to import a text document I had created in Nisus Writer Pro into InDesign. The Nisus file used two fonts: Times New Roman and Verdana. When I tried to import the .rtf file, I got a font alert that I did not have AmazonEmerald in my font book. Of course I didn't; I didn't use it! Where did it come from? I clicked Skip in the font problem window. Then, after import, I discoverd that only about the first page of the .rtf imported. There was a huge space thereafter. I imported the file again into the workspace, i.e. not on the page where I intended it to be, and dragged the bottom as far as I could. No text.
I eventually succeeded in getting what I wanted, more or less, by importing the file as .txt. Of course, all formatting is now gone, including footnotes, etc.
Can you open your .rtf successfully using Mac's Text Edit app?
I can't imagine why a missing font would cause your missing text. I did a search for Amazon Emerlad and found nothing. There's an Amazon Ember font... is that what you meant? In which case you can find that font online from Amazon to download to at least test if that changes anything.
This is an excellent idea. If you can, make some insignificant change (e.g. adding a space) and resave the .rtf. There are plenty of tools that can generate RTF files, but they don't all do it the same way. Nisus Writer is one that I've encountered before as generating RTFs that InDesign doesn't like.