"New in Release 318.104.22.168.40.122: IMPORTANT: This graphics driver update contains a security improvement in the NVIDIA Driver Manager preference panel via a new Developers Tab.
If you have the previously recalled 322.214.171.124.15.108 Web Driver installed, it is necessary that you uninstall that driver completely and replace it with this. See the Additional Information section for more details.
(The previous 10.13.6 driver posted here Jan. 25th was 3126.96.36.199.40.118.)
Release Notes Archive:
This driver update is for Mac Pro 5,1 (2010), Mac Pro 4,1 (2009) and Mac Pro 3,1 (2008) users.
BETA support is for iMac 14,2 / 14,3 (2013), iMac 13,1 / 13,2 (2012) and MacBook Pro 11,3 (2013), MacBook Pro 10,1 (2012), and MacBook Pro 9,1 (2012) users."
The "Additional Information" tab on the download page has a step-by-step install guide.
(If you can't select the page's 'Accept' terms/conditions button, here's a direct download link.)
(Thanks George) See below for Feb. 27th posted CUDA update.