How do I resolve the MADCATZ R.A.T 9 cursor bug in El Capitan?
This helped to me:


  Update: I've loaded the Madcatz Software (for 10.9) against from here http://madcatz.com/downloads/ and now its working. No USB Overdrive or something like that installed, just the Madcatz software.
  These are the steps you have to do:
  Uninstall all other mouse drivers - USB-Overdrive, SteerMouse, Logitech, Razer, etc.
  Restart.
  Install the MadCatz driver/editor software.
  Restart.
  Add the Mad Catz Editor to the Accessibility permissions list. System Prefs -> Security &amp; Privacy -> Privacy -> Accessibility. Click the lock to authenticate then drag the Mad Catz Editor into the list to give it permissions.
  Create/edit profiles and commands. Be sure to save the profile(s).
  Use the menubar item to assign a profile to the mouse.
  If it's not working, add that to your startup items:
  /Library/PrivilegedHelperTools/MadCatzSmartTechnology.app


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