Best reference manager and PDF editor for Mac?

Posted by Wojciech
Sep 23, 2019 at 06:53 PM

Dear Colleagues,
I apologize for the rather off-topic question, but I would like to ask Mac users for help - what would you recommend as the best (both free and paid), firstly, reference manager for academic writing and, secondly, PDF files editor? In the latter case, I mean mainly the possibility of correcting and replacing text directly on the page, and not as comments somewhere on the side.