Recent Software Updates
at
https://endnote.com/downloads/available-updates
is outdated because it shows EndNote X9.3.2 for Macintosh.
Yet, there is a newer version, as shown at
EndNote X9: Updates
EndNote X9.3.3 (Bld 15659)
https://support.clarivate.com/Endnote/s/article/EndNote-X9-Updates?language=en_US