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.

According to Apple's release **tes, the
10.12.3 update "improves the stability, compatibility, and security of your Mac." ** 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 **tes with a release. We do, however, k**w 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.
Related Roundup:
macOS Sierra
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