Important update for EndNote users with MacOS systems
As you may be aware, Apple will be releasing macOS 10.15 Catalina this fall. Apple has made the decision to drop all 32-bit application support with this release, which will impact EndNote.
EndNote X9 for macOS will be extensively updated for compatibility prior to the launch of Catalina. If you already have EndNote X9, please install all updates as they become available to avoid interruption in your workflow.
If you are running EndNote X8 or earlier, we recommend upgrading to EndNote X9 as based on early information from Apple, your current version will not work with macOS Catalina. Alternately, you may keep working on your current macOS version.
Read the full article: https://support.clarivate.com/Endnote/s/article/EndNote-for-Mac-macOS-Catalina-Compatibility.