Apple seeds third macOS Sierra 10.12.1 beta to developers

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macOS Sierra logo
A new macOS Sierra beta is here.
Photo: Apple

The third beta builds of macOS Sierra 10.12.1 was seeded to developers today, less than a week after Apple released the second build that contained a number of bug fixes.

Developers can pick up the new beta directly form the Apple Developer Center, or install it via the Mac App Store’s software update option if the previous beta build is already installed on your Mac.


Apple’s release notes for beta 3 build 16B2338c don’t mention any major new additions. The first version of the beta added support for iPhone 7 Portrait modes pictures to the Photos app. The new update most likely focuses on under-the-hood improvements and performance enhancements.

This could be the last beta build of macOS Sierra 10.12.1 that Apple releases before being made available to the public. According to a recent rumor, Apple is trying to finish development of macOS Sierra 10.12.1 so it can be used on the new MacBook Pros that will supposedly be announced later this month.

The long-rumored new MacBook Pro is expected to get some design tweaks, with the most notable being an OLED touch bar that replaces the function row of keys. The power button may also get Touch ID capabilities.

We’ll let you know if we find any new features or clues in macOS Sierra 10.11.2 beta 3 once its installed on our machines.