"Latest from nVidia website (as of 5/20): 346.01.02f03. (D/L page dated May 12th.)
I installed this (f03) version and it made a very much improved interface with my Hackintosh. (i7-4770K 3.5GHz, with EVGA nVidia GT 740 2GB card.)
For once it equals my (default) Apple OS X driver in performance and also has no issues with the BIOS setup (set for PCIe card vs onboard HD4600), which the previous version did. ('incompatible' warning on f02 install.)
Below are my results on the "Heaven" benchmark (1280x1024, 2x FSAA, Medium quality).
(Scores from benchmark screenshots. Onboard Intel HD4600 scored 12.4 FPS.)

Using default OS X driver: 32.2 FPS, (Min 14.2/Max 58.7)

Using nVidia f03 driver: 32.1 FPS (Min 14.2/Max 59.5)
(He later wrote about trying the May 21st f04 driver.)
I installed the latest (f04) version and it plays Heaven at the same rate as "f03".
-Bill S."

I noticed in the Heaven benchmark results screenshot using the default OS X driver had GPU listed as "Nvidia Chip Model (256MB)". (Maybe due to GT 740 not having Mac EFI?) When using Nvidia (f03) driver the benchmark's GPU info shows "Nvidia Geforce GT740 (2047MB)".

A 2008 Mac Pro owner with older Nvidia GTX-285 card reported problems with f03:

"Nvidia webdriver 346.01.02f03
FYI, I am running Yosemite 10.10.3 on a early 2008 MacPro with a Geforce GTX 285 card. After installing the latest Nvidia web driver, most of my applications crash as soon as I go to File->Open to access a file. I did not have this problem before the 10.10.3 update using the f02 driver.
  I know it is the web driver because when I opt for the OS X Default Graphics Driver, it does not happen. I sent a bug report to Nvidia. If and when I hear anything, I will let you know.

(Can you reinstall the 346.01.02f02 driver? Does new f04 driver help?)
f04 fixed the problem of crashing when going to File->Open.
-th"

• Mac Pro 4,1 (Northbridge) Temperatures (apple forum)
  (Reminder to check for broken plastic NB heatsink retainers)

• If you need help restoring from an iCloud backup
• iCloud: Limits for Contacts, Calendars, Reminders, and Bookmarks
  
  
• If an app you installed unexpectedly quits, stops responding, or won't open
  
  
• Device Enrollment Program: Enrolling a serviced device
  
  
• How to Set up your Apple Watch
• If your Apple Watch doesn't respond or won't turn on

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

May 19th, 2015 News Archive
• New 15-inch MacBook Pro with Force Touch Trackpad
• New $1,999 iMac with Retina 5K Display
• Teardown of the 2015 27-inch iMac w/Retina 5K display
• Mac Borderlands: The Pre-Sequel v1.06 update (and patch notes)
• Microsoft Office for Mac 2011 14.5.1 update (info/download)
• Chrome 43.0.2357.65 with 37 security fixes
• Apple Watch OS 1.0.1 release notes
• Apple iPhone Lightning Dock
• Carbon Copy Cloner 4.1.3
• Apple How-To/Troubleshooting Article Updates: (partial list)
  - About the Apple Lightning docks
  - Troubleshooting problems sending or receive email
  - Contact Info for Apple TV content providers
  - How to Reset the Lockdown folder in iTunes
  - Resolve iOS update and restore errors in iTunes
  - Add your computer, iPhone, iPad, or iPod touch to iTunes Match
  - Change or remove your payment information in the iTunes Store
  - About security content of Watch OS 1.0.1
  - How to change your Apple Watch band
  - How to Update the software on your Apple Watch
  - Adjust the intensity of haptic alerts on your Apple Watch
  - Get help connecting your iOS device with a Bluetooth accessory
  - Preview a print project in Photos, iPhoto, or Aperture to avoid issues
  - How to use AirPlay to wirelessly stream content from iPhone, iPad, iPod touch

For links to older news pages, see the Archives.