If you mean, you upgraded to Mac OS X 10.11 (El Capitan), you should know that your old software will probably not run successfully on El Capitan. It will never be upgraded, it is not supported for that OS. You're basically on your own.
You can roll back to your previous OS, or you can get InDesign CC (subscription).
You know what's weird? Not all indesign documents are crashing the software. Perhaps I added a "corrupt" image to the indesign document I was working on, and this made Indesign crash, ONLY when moving pages around or deleting pages. Cand this be possible?
In the other hand, I think I should get In Design Cloud...