NVivo can be used with EndNote. A Library (or references) can be exported from EndNote to NVivo.
Work with EndNote references in NVivo, to explore the literature:
NB: At this stage the MAC version of NVivo doesn't offer this full functionality.
Explore the literature (from your EN library) in NVivo
Export an EndNote Library into NVivo
(Shared with permission from Southern Cross University)
See also guide from QSR: Importing EndNote references in NVivo
For step by step instructions for exporting References from EndNote and importing them into NVivo: