Same problem here too… I tried updating Endnote X7 to verion 17.2.0.9970 and once I hit ‘donwload and install’, it got forzen. I had to force quit it to use it again. I’m running OS Yesemite ver 10.10.4…
I’m eager like the many other Endnote users to see the new update of Endnote that solves the compatability issue with Word 2016… I add my voice to theirs!!!