What operating system?
my operating system is Mac OS 10.11.3 here is what is says
Process: Adobe InDesign CS6 
Path: /Applications/Adobe InDesign CS6/Adobe InDesign CS6.app/Contents/MacOS/Adobe InDesign CS6
Version: 126.96.36.1990 (8000)
Code Type: X86 (Native)
Parent Process: ??? 
Responsible: Adobe InDesign CS6 
User ID: 501
First thing is to install the latest patch for your version of InDesign. You can download it here: Adobe - InDesign : For Macintosh : Adobe InDesign CS6 8.0.2 update - All Languages
But you also should know that CS6 is not very compatible with El Capitan and you may not get it running correctly on your OS.