Early feedback indicated that for some at least, 10.10.3 may have fixed their Wi-Fi problems. Saw several threads in Apple's forum on incorrect disk space listed (hundreds of TBs) after the Yosemite Recovery update (for example this one). One suggested tip is to force a Spotlight re-index but others said it was not be fix. A different tip in another thread was to turn Time Machine Off, but after turning TM back On the problem returned. (If turning Time Machine Off corrected it, perhaps a bug related to TM local snapshots.)
Another problem reported in several threads was related to errors/warnings connecting to secure websites (via https). I didn't see this problem in OS X 10.9.5 but here's a thread with Tips for SSL Certificate Problems after OS X Security Update 2015-004.
Today's Apple support articles listing below has several on the new Photos app.
(I'm not using Yosemite but check feedback in the OS X Yosemite and Photos for Mac forums.)
Since 10.10.3 and Security Updates will have a later build numbers, users of Nvidia's web drivers should use the Nvidia Prefs panel to switch to the default OS X driver before updating OS X. (And check Nvidia prefs for later driver updates as they usually appear sooner than on the Nvidia website downloads.)
FYI on Links to Nvidia OS X Driver Updates:
Rather than keep posting later Nvidia updates here, see the Mac Video Cards/Drivers section for links to Nvidia OS X Graphics Driver updates and CUDA releases.
(See below for apple info on OS X Server 4.1, Xcode 6.3, iOS 8.3 and Apple TV 7.2 updates.)
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OS X's Keychain Password Request Dialog Does Not Inspire Trust
LaCie Doubles Capacity of Rugged Thunderbolt SSD to 1TB
LG Display outs iMac with 'super high-res' 8K screen
No 4K Streaming on Next Apple TV?
Apple Support Article Updates: (partial list)
- How to identify Mac mini models
- About Apple video adapters and cables
- Mac Basics Guide to Using Mission Control
- What to do before you install iOS beta
- How to Restore your Apple TV (2nd and 3rd gen.)
- Use Control Center on your iPhone, iPad, and iPod touch
- Use iBooks with PDF documents on your iPhone, iPad, and iPod touch
- Device Enrollment Program: iOS Activation Procedure and MDM Enrollment