What Mac OS X operating system?
Exactly what happens when you open any file? Error message? Crash?
I am having the same issue. I am running Mac OS sierra and Using the latest version (2015 of Indesign CC) Indesign won't open ANY files. No error messages just beachballs. It will create a new file and seems to function normally.
Strangely enough if I switch user accounts InDesign functions properly.
Start by trashing the prefs in the old account. See Troubleshooting 101: Replace, or "trash" your preferences
If the first method you try doesn't solve the problem, go ahead and try the other method, too.