While thats a great security feature, it has been messing with certain software.
If you want to get a glimpse of what isnt working, MacIssues shows you how.
But that doesnt really show you what SIP is blocking.
For that, youll need to dig around in some folders.
Here, youll find a list of components that dont meet El Capitans new security protocols.
How to see software disabled by OS X 10.11 El Capitan| MacIssues