Hi, did you find a solution? I'm having the exactly same issue with ID CC 2015 on El Capitan...
I'm having the same issue as well, ID bounces in my doc for a bit then just stops, I never even see the start-up screen…Activity Monitor shows InDesign CC 2015 (Not Responding)…
I found a previous thread addressing updates not showing in CC Desktop, I removed the opm.db file and was then able to update, hoping that would solve my problem—no luck
Did either of you find a solution?
For me, most recent ID and Mac - Yosemite. Prefs dumped, uninstall, reinstall. Defrag. Turn all fonts off in Font Book. Signed out and back in of CC app. Nothing. Will try to dump opm.db but not optimistic.
This slow down/not responding/won't open thing has TONS of forum posts. When will they address us?