NVIDIA has released alternate graphics drivers for OS X El Capitan 10.11.3. These are separate from the drivers Apple ships as standard, and should be considered experimental. These drivers have been known to solve OpenCL issues with certain applications, as well as providing better native GPU power management for certain devices.If you've installed the drivers before, you may get a notification to update to the new drivers from the built in System Preferences pane.In order to use the alternate drivers on a CustoMac, you must first install the driver package. Also make sure to choose NVIDIA Web Driver using the standard menubar or system preference pane then reboot.