Welcome Chris,
To help us help you could you please take a moment to fill in your signature with information similar to what I have, in the "userCP' that is found at the top left of the page - thanks.
Haven't ever seen that but suggest that you may have created that as a different user?
Try moving the folder containing the catalog to the desktop and try that and try with another user if you have one.
Maybe a screen cap of you LR catalog location in finder would help too please.