If an app isn't working as you expect
After you upgrade OS X on your Mac, you might find that some applications don't work or act as you expect. An app might not open, run, or install, even if you try to reinstall it.
You might see this issue if:
- Your Mac has software installed on it that's known to be incompatible with your new version of OS X. This software is placed in an Incompatible Software folder during the upgrade process.
- Your Mac has software installed on it that conflicts with System Integrity Protection in OS X El Capitan.
Make sure that you have the latest version
If an app doesn’t work after you upgrade, make sure you have the latest version:
- Check for an updated version of the app that is compatible with your new OS. Apps in the Mac App Store list their compatibility and system requirements on their product pages.
- Check if the app developer has a new version or plans to release a new version of the app that is compatible with your new OS.