Apple Seeds Second macOS Sierra 10.12.1 Beta to Developers and Public Beta Testers - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

Apple Seeds Second macOS Sierra 10.12.1 Beta to Developers and Public Beta Testers

Apple today seeded the second beta of an upcoming macOS Sierra update to developers and public beta testers for testing purposes, nearly a week after seeding the first beta and a week after releasing the new operating system to the public.

macOS Sierra 10.12.1 beta 2, build 16B2333a, can be downloaded from the Apple Developer Center (developers only), Apple's beta testing website (beta testers only) and through the Software update mechanism in the Mac App Store for those who previously installed the first 10.12.1 beta.

macossierra
macOS Sierra 10.12.1 appears to focus on bug fixes and under-the-hood performance improvements to address issues that have been found since the operating system's release. Few outward-facing changes were discovered in the first beta, but it does include Photos support for the new iPhone 7 Plus Portrait feature introduced with the iOS 10.1 beta.

Any new features that are discovered in the second 10.12.1 beta will be listed below.

macOS Sierra is a significant update that brings features like Siri support, a new storage optimization option, cross device copy paste, auto unlocking with the Apple Watch, and more.

Related Forum: macOS Sierra

Popular Stories

iOS 27 on iPhone 17 1

iOS 27 Will Add These New Features to Your iPhone

Saturday May 2, 2026 8:43 am PDT by
Apple is expected to unveil iOS 27 during its WWDC 2026 keynote on June 8, and there are already many rumored features and changes for iPhones. The first developer beta of iOS 27 will likely be available immediately following the keynote, and a public beta typically follows in July. Following beta testing, the software update should be released to all users with a compatible iPhone in...
Apple MacBook Pro M4 hero

Why You Might Want to Wait to Buy a MacBook Pro

Friday May 1, 2026 3:43 pm PDT by
Apple refreshed the 14-inch and 16-inch MacBook Pro with M5 Pro and M5 Max models in March 2026, but depending on your needs and interests, you might want to skip this generation because there's something better in the works. The M5 Pro and M5 Max MacBook Pro models have faster chips, but the same design that Apple has used since 2021. An updated design with new display technology and faster ...
Apple Event Logo

Apple Just Released a New Accessory

Monday May 4, 2026 8:13 am PDT by
Apple today released a new Pride Edition Sport Loop for the Apple Watch. The band features a rainbow design with 11 colors of woven nylon yarns. The new Pride Edition Sport Loop is available to order now on Apple.com and in the Apple Store app in 40mm, 42mm, and 46mm sizes, and it will be available at Apple Store locations starting later this week. In the U.S., the band costs $49. There...

Top Rated Comments

125 months ago
10.12.1 beta 1 brought newer and better drivers for Polaris GPUs. It added a new kext file AMDRadeonX4100.kext which solely contains PCI IDs for Polaris 11 GPUs.

References of Polaris GPUs in AMD9500Controller.kext


Radeon RX 480 is almost fully functional in tower Mac Pro (with 2 kext edits)


Attachment Image

Attachment Image
Score: 17 Votes (Like | Disagree)
canny Avatar
125 months ago
Why can't I type into Siri? So it's maybe merged with Spotlight? Does Apple expect me talk to my computer in a quiet office with a dozen other people?
Score: 7 Votes (Like | Disagree)
125 months ago
awesome! they are fixing bugs faster for the next month's release of Macbook Pro's :) can't wait :D

just give me my precious !
Score: 7 Votes (Like | Disagree)
GIZBUG Avatar
125 months ago
what about iPhone beta 2?
This thread is for macOS Sierra...
Score: 6 Votes (Like | Disagree)
\-V-/ Avatar
125 months ago
Why can't I type into Siri? So it's maybe merged with Spotlight? Does Apple expect me talk to my computer in a quiet office with a dozen other people?
I don't think they expect you to do anything. If you can't use it in your office, then don't. It's a feature that requires your voice. Getting upset at a feature for things it wasn't designed to do just seems silly.
Score: 4 Votes (Like | Disagree)
125 months ago
Possibly related to the new Macs?
Absolutely. A handful of people (myself included) have tried RX 460/470/480 GPUs in the tower Mac Pro with success. Fiji GPUs benefit from these new drivers as well.
Score: 4 Votes (Like | Disagree)
Related Apple News: Mac | Politics | Reviews | Travel | World News