Apple today seeded the fourth beta of an upcoming macOS Sierra 10.12.3 update to developers, a few days after seeding the third 10.12.3 beta and more than a month after releasing macOS Sierra 10.12.2, the second update to the macOS Sierra operating system.

The macOS Sierra 10.12.3 update is available for download through the Apple Developer Center or through the software update mechanism in the Mac App Store.

macos-10-12-3-beta
According to Apple's release notes, the 10.12.3 update "improves the stability, compatibility, and security of your Mac." No specific changes, bug fixes, or feature additions were discovered in the first three betas, but we'll update this post should any new features be found in the fourth beta.

With bug fixes, it's often hard to determine exactly what's included in an update until Apple supplies detailed release notes with a release. We do, however, know that this update fixes a Safari bug that caused battery life problems during the MacBook Pro testing conducted by Consumer Reports.

Available since September, macOS Sierra is the latest Mac operating system. It includes Siri support, Apple Pay for the web, Universal Clipboard, Apple Watch auto unlocking, improved iCloud Drive integration, Picture-in-Picture multitasking, and dozens of smaller features that can be found in our macOS Sierra roundup.

Update: The fourth macOS Sierra 10.12.3 beta is also available for public beta testers.

Related Forum: macOS Sierra

Top Rated Comments

hippielover Avatar
93 months ago
Does anyone know what has been changed since beta 2 and 3
I got fatter
Score: 23 Votes (Like | Disagree)
Vashetti Avatar
93 months ago
Public Beta too
Score: 3 Votes (Like | Disagree)
MacBird Avatar
93 months ago
Build 16D30a
Score: 2 Votes (Like | Disagree)
jlc1978 Avatar
93 months ago
i wonder if they fixed the USB bug where drives are disconnected and not recognized after waking from sleep...
Score: 2 Votes (Like | Disagree)
ghostface147 Avatar
93 months ago
Hmmm, that damn iTunes sync bug needs to be fixed.
Score: 1 Votes (Like | Disagree)
Vashetti Avatar
93 months ago
I learned from Apple employee that installing beta leaves some junk on the phone that cannot be removed unless you setup phone as new. Some of the issues that I experienced includes (1) super slow "copying diagnostics", (2) local video not syncing with TV app, and (3) ballooning iCloud backup size.

Needless to say, I shan't bother with iOS beta anymore.
Great. But what does that have to do with macOS?
Score: 1 Votes (Like | Disagree)

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