These are the system requirements: https://helpx.adobe.com/indesign/system-requirements.html
Have you tried:
1) Uninstalling (using the Creative Cloud app) and reinstalling InDesign CC2014/2015?
2) Try trashing your InDesign preferences:
Close and relaunch InDesign, and IMMEDIATELY hold down Ctrl + Alt + Shift (Windows) or Cmd + Ctrl + Opt + Shift (Mac), and respond in the affirmative to the dialog asking if you really want to replace the preferences. You must be extremely fast on the keyboard (if you don’t see the confirmation prompt, you were too slow!)
Derek; tried both options and they didn´t work.
As soon as the app Welcome window appears everything freezes and I have to shut down completely.
I have a iMac Intel Core 2 Duo with the 10.7.5 OS. The systems requirements states a multicore is needed. Does my machine comply with this?
If it does, what else can I try.