I can't get the Magic Citations of Papers 3 to work with Manuscripts on my MacBook Pro.
When I type the shortcut (ctrl + ctrl) it just gives me the option to paste the citation to my clipboard, and not insert a citation or a footnote as it would do with Microsoft Word for Mac.
A workaround is to paste the citation from your clipboard in a Manuscripts generated foot- or endnote, but then I have no idea how to automatically generate a bibliography.
If you advertise Magic Citations as "beautifully integrated with Manuscripts" please make it so.
I hope I am missing something and the Magic Citations is truly well integrated. I am working on Manuscripts via Setapp and I have a copy of Papers 3, all on my Mac.