I am the OP and have given up on Endnote. I switched to Zotero and am much happier. I won’t be going back. I have been through several Mac OS updates on Endnote and always had issues, the betas for development are out for months prior to release allowing most developers to eliminate bugs and proactively ensure that apps work. I don’t think Mac users account for enough numbers and hence, changes in Word or Mac OS often disables Sente. I am happy with Zotero, there are issues but so far it works for me. I was a long time Sente user and am much more satisfied with library handling and syncing in Zotero. So far, none are as good as Sente but Sente is gone.