Apple will release a 64-bit only Mac OS called Catalina in late 2019.
If you have a Mac and use Endnote you must be aware of these recommendations:
Endnote is for researchers and HDR and Honours students and students whose final year course involves a major research project.
Researchers and higher degree students should contact their liaison librarian for an Endnote introduction and for support.
Endnote is not supported for undergraduate and coursework students.
What does that mean?
A bibliographic citation is any reference to a book, journal article, video, or other source that you might use in an academic paper or article. EndNote allows you to manage those citations by saving, organizing, and formating them into a bibliography or reference list in your thesis, publication or assignment.
Learn EndNote FAST. This is a very quick but thorough coverage of EndNote's main features. It covers some advanced features not covered in this Guide and is most suitable for more advanced users.(Duration 22:47)
Mac users: OS10.10 (Yosemite) or later required to run Endnote X8
There is no app for Android devices