Multiple citation managers are incompatible
If you have another citation management programs installed on your computer, you will have to disable it in Word before Word will work with EndNote.
Uncheck the other citation management ".dotm" then click ok.
After updating to Sierra and installing Endnote, you may find that Word 2011 gets caught in an "update Java" notification loop – Word won’t work unless you update Java, but it doesn’t seem to let you get away from the notification screen.
It is actually not necessary to get the screen notification to close, so simply quit Word and download Java. You may even get a notification screen with a button to go to the Java site. You can follow the link even with the screen refusing to close and giving you a sound alert.
Remember, a full quit is not the same as closing a window. If you have trouble quitting, try this:
Download “Legacy Java SE 6.” Once this is updated, you shouldn’t have any Word issues, and the EndNote toolbar should appear
The production version of EndNote X8.1 was not compatible with Word (16.xx), but the most recent X8 update, X8.2 addressed this issue.
Most Mac communites seem to indicate that Word 2008 is the oldest version of Word that works safely with Yosemite.
Many people like to get a new version of Word after they get EndNote. Here are several options for getting access to Word, and warnings about what will or will not work with EndNote.
Are you missing the EndNote Toolbar? You should see the floating toolbar below. The EndNote X8 version looks about the same, but has a round blue logo.
If it is not in your document window, check to see if it is in your list of available toolbars. The location can vary according to the version of Word, but is typically in the View menu. Make sure the EndNote X7 or Endnote X8 selection is checked.
If there is NOT an EndNote option in your toolbars list, the next thing to do is to try fixing it using the Customizer. Find instructions for using the Customizer on the Troubleshooting tab of this guide, near the bottom.
If the Customizer could not fix it, or if you don't have an EndNote version X7.5 or later, you may need to get assistance from Technical Support, or from an EndNote trainer. There are several possible reasons for the toolbar not displaying -- from simple changes needed in Word Preferences, to more complex issues. Getting assistance allows you to work through all the possibilities.