"New in Release 346.03.02f01

Graphics driver updated for Mac OS X El Capitan 10.11 (15A284)

Contains performance improvements and bug fixes for a wide range of applications.

Includes NVIDIA Driver Manager preference pane.

Includes BETA support for iMac and MacBook Pro systems with NVIDIA graphics

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. "

See below for new CUDA Update supporting OS X 10.11 El Capitan.
  

"New Release 7.5.20

CUDA 7.5 support

Supports Mac OS X 10.11.x, 10.10.x, 10.9.x

An alternative method to download the latest CUDA driver is within Mac OS environment. Access the latest driver through System Preferences > Other > CUDA. Click 'Install CUDA Update'. Supports all NVIDIA products available on Mac HW.

Note: this driver does not support the older generation GPUs with compute capability 1.x. To find out the compute capability of your GPU, consult the following links:
https://developer.nvidia.com/cuda-gpus
https://en.wikipedia.org/wiki/CUDA."

• How to Create a Bootable El Capitan USB Install Drive with DiskMaker X (owc blog)
  
  
• Info on games not running properly with 10.11 El Capitan (aspyr support)
  List of known issues with OS X 10.11 and Borderlands 2/BL: TPS Steam (Shift isn't connecting properly), COD: Black Ops (Random crashing in SP/Freezing after dying in SP), C&C: Generals Deluxe Crashing after upgrading to OSX 10.11, and Game Center app enabled MP games (Mac App Store only) are unable to view or join hosted games on 10.11.
  
  
• Late posting this but John K. sent a note on a warning from Native Instruments on OS X 10.11 Compatibility. (Validation of AU (Audio Units) Plug-ins Fails in Logic Pro X and Kernel Panic when Using Legacy Native Instruments Devices. The linked page includes a note/link to beta drivers for the latter.)
  
  
• Lost mail accounts after OS 10.11 upgrade (apple forum)
  (one of many early threads on Mail problems after the upgrade)
  
  
• Can't connect to Synology network storage after El Capitan upgrade (apple forum)
  
  
• EtreCheck v2.5.3 (Checks signatures of Apple files, Adds detail settings, Updated UI)
  (2.5 to 2.5.3 have same release notes. Assume 2.5.1/2.5.2/2.5.3 are bugfixes.)

• About System Integrity Protection on your Mac (in OS X El Capitan)
  
  
• How to edit your photos using third-party extensions in Photos for OS X (El Capitan)
  
  
• What to do if you can't send or receive email on your Mac

(More at topic-based page of How-To, Troubleshooting & Tips for Mac/OS X/iOS Users.)
  

• VirtualBox 5.0.6 change Log has some OS X Host related fixes, 2 for El Capitan.
  
  
• Yamaha RX-A1050/2050/3050 A/V Receivers Firmware Update 1.61
  Also a 1.61 firmware update for flagship pre-pro CX-A5100 with same change list.
  ("Enables MusicCast functions & Improves connectivity of network music streaming services")