Security Update 2016-001 changes the build of Mac OS X 10.11.6 to 15G1004. NVIDIA Web Driver 346.03.15f02 is not compatible to this build.
Use the NVIDIA Driver Manager system extension to check for updates. NVIDIA Web Driver 346.03.15f03 is available. If this fails for any reason you can still fall back to the old methods of fixing this situation.
Old Method 1: Get the beta driver...
[Solved] Security Update 2016-001 not compatible to Nvidia driver 346.03.15f02
Use the NVIDIA Driver Manager system extension to check for updates. NVIDIA Web Driver 346.03.15f03 is available. If this fails for any reason you can still fall back to the old methods of fixing this situation.
Old Method 1: Get the beta driver...
[Solved] Security Update 2016-001 not compatible to Nvidia driver 346.03.15f02