NVIDIA has released their alternate graphics drivers for OS X Mavericks 10.9.5. 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 10.9.5 drivers from the built in System Preferences pane. NVIDIA Web Driver 334.01.03 10.9.5 (Build 13F1603) http://www.nvidia.com/download/driverResults.aspx/97607/en-us NVIDIA Web Driver 334.01.03 10.9.5 (Build 13F1134) http://www.nvidia.com/download/driverResults.aspx/93422/en-us How to Install the Web Drivers: In order to flag the alternate drivers on a CustoMac using Chameleon/Chimera, you must install the package and also add the flag manually to the chameleon.org.Boot.plist. If you use Clover, you can toggle back and forth using the standard menubar or system preference pane. 1. Open Finder 2. Navigate to /Extra/org.chameleon.Boot.plist 3. Open in TextEdit 4. Add nvda_drv=1 to Kernel Flags as shown: Example Usage: Code (Text): <key>Kernel Flags</key> <string>nvda_drv=1</string> 5. Save and reboot You should be on the new NVIDIA drivers. Related: NVIDIA Releases Alternate Graphics Drivers for 10.9.4 (333.01.02f02) NVIDIA Releases Alternate Graphics Drivers for 10.9.3 (331.01.01f01) NVIDIA Releases Alternate Graphics Drivers for 10.9.2 (331.01.01) NVIDIA Updates Web Drivers for 10.8.5 (313.02.03f01) NVIDIA Updates Web Drivers for 10.8.4 (313.01.02f01) NVIDIA Releases Mountain Lion 10.8.3 Graphics Drivers Please note that these drivers should be considered experimental. If you aren't having any issues, do not install- the native OS X drivers work great for most people.