Close Word and EndNote.
Open your hard drive and go to the folder: EndNote X-: Applications:EndNote X-:Cite While You Write
Copy the file EndNote CWYW Word 2011.bundle
Go to the folder Applications:Microsoft Office 2011:Office:Startup:Word and paste the copied file
Start Word, go to Word > Preferences and click on File Locations
Make sure the Startup folder is set by highlighting Startup and clicking on Modify. Navigate to Applications folder then Microsoft Office 2011:Office:Startup:Word and click Choose
Click OK and close Word.
Start EndNote and then start Word. - See more at: http://www.bartneck.de/2012/06/24/endnote-toolbar-not-visible-in-microsoft-word-2011-for-mac/#sthash.VLajtHon.dpuf