OS X El Capitan App Compatibility
With a long beta period and lots of users testing OS X El Capitan, you might assume that all apps work out of the box. As we mentioned with Office 2016, this is not the case.
If you rely on apps, you should check with the developer and on social media to see how an app is performing on OS X El Capitan.
We also found this list of apps that don't work on OS X El Capitan, and those that do, on MacRumors incredibly helpful.