Greetings johnbirrane,
The Mac installer for EndNote versions X7 and earlier required that you manually drag the EndNote application folder to the Applications folder on your hard drive - it was possible to accidentally drag this folder elsewhere. However, EndNote X8 should perform this folder copying action automatically. If you aren’t able to find the mentioned EndNote X8 folder within Applications, I would try searching your hard drive for “EndNote X8” to see if you can find this application folder somewhere else. If you’re unable to find this folder at all, I would suggest reinstalling EndNote X8 to ensure you’ve got a complete application folder, including the mentioned Terms folder: