Apple Seeds Third Beta of macOS Sierra 10.12.6 to Developers [Update: Public Beta Available] - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

Apple Seeds Third Beta of macOS Sierra 10.12.6 to Developers [Update: Public Beta Available]

by

Apple today seeded the third beta of an upcoming macOS Sierra 10.12.6 update to developers, two weeks after seeding the second 10.12.6 beta and a month after introducing macOS Sierra 10.12.5.

macOS Sierra 10.12.6 can be downloaded through the Apple Developer Center or through the Software Update mechanism in the Mac App Store.

10
No significant features or notable bug fixes were found in the first two macOS Sierra 10.12.6 betas, and because Apple does not provide beta release notes, we may not know what's included in the update until it sees a public release.

macOS Sierra 10.12.6 is likely to be one of the final updates to the Sierra operating system as Apple transitions to macOS High Sierra, which was introduced at the Worldwide Developers Conference in June.

Update: The third beta of macOS Sierra 10.12.6 is also available for public beta testers.

Related Forum: macOS Sierra

Popular Stories

Apple Event Logo

Apple Working on All-New Operating System

Wednesday July 29, 2026 11:39 am PDT by
Apple is developing an all-new operating system that is essentially a mix of tvOS, watchOS, and iOS, according to Bloomberg's Mark Gurman. In a report this week, he said the operating system will feature a grid of icons, widgets, and apps, along with customizable clock faces. The new software platform is intended for Apple's long-rumored smart home hub. With built-in facial recognition,...
Read Full Article
imac video apple feature

Apple Made Its Second-Biggest Acquisition Ever This Year

Wednesday July 29, 2026 12:03 pm PDT by
Apple this year acquired Israeli startup Q.ai for close to $2 billion, according to the Financial Times. That would make this Apple's second-biggest acquisition ever, after it paid $3 billion for the popular headphone maker Beats in 2014. This is also the largest known Apple acquisition since the company purchased Intel's smartphone modem business and patents for $1 billion in 2019. Q.ai...
Read Full Article
Dynamic Island iPhone 18 Pro Feature

iPhone 18 Pro: Twelve Changes Coming to Apple's Next Flagship

Thursday July 30, 2026 3:43 am PDT by
We're less than two months out from the launch of Apple's premium next-generation smartphone lineup, and while we're not expecting a dramatic change in terms of functionality, there are still several enhancements rumored to be coming to the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth noting is that Apple is reportedly planning a major change to its iPhone release cycle this year,...
Read Full Article • 31 comments

Top Rated Comments

L
lkrupp
119 months ago
So many betas nowadays :)
Waiting for 10.13 DP 2
I guess there’s no middle ground. Some are always screaming, “Doesn’t Apple test this stuff before they release it.” “Apple’s QA is in the toilet these days” “Steve would never have allowed this.” Now we’re starting hear, “Too many betas.” “Too confusing.” “Take my hand and show me ,step by step, how to back out of this POS beta.” Apple can’t win.
[doublepost=1497378192][/doublepost]
Seems like a cheap way to crowd source bug spotting. The only problem I fear is that internal QC/QA has been cut in response. Some things like security really need to be done right the first time.
See what I mean?
Score: 9 Votes (Like | Disagree)
A
asiga
119 months ago
When this goes final, I wonder if this will be the time to upgrade from El Capitan on my daily driver? I don't usually wait so long, but almost all of the new features in Sierra don't apply to me.
After bad experiences from updating soon these last years, I decided to update only once per year, in summer, when they release the last update for the current MacOS. It's somewhat drastic, but it works great for me, as it lets me work with the same level of stability I was used to in the 10.4.x - 10.6.x years. So, yes, I'm updating to Sierra when 10.12.6 gets final.
Score: 4 Votes (Like | Disagree)
K
kalakana
119 months ago
I think high Sierra will just be super stable.
cough...brand new file system, what can go wrong...cough
Score: 3 Votes (Like | Disagree)
manhattanboy Avatar
manhattanboy
119 months ago
So many betas nowadays :)
Seems like a cheap way to crowd source bug spotting. The only problem I fear is that internal QC/QA has been cut in response. Some things like security really need to be done right the first time.
Score: 2 Votes (Like | Disagree)
ScooterComputer Avatar
ScooterComputer
119 months ago
I'm still waiting to hear that PDFKit has been fixed before upgrading to Sierra. Why the total radio silence on this issue from all directions?
Agree. Biggest hurdle right now for upgrading clients from 10.9.5 (yeah, that's right… it is the last "stable" OS without significant issues with productivity apps like Mail and Calendar) to 10.12 is PDFKit, because my business clients rely on PDF and being able to sign/form fill too much. It can't NOT WORK, because many of them are in the legal profession or use PDFs for legal compliance. 10.12 has remedied just about EVERY other issue I had with macOS otherwise… which makes it a shame, then, that I can't push the upgrade.
Score: 1 Votes (Like | Disagree)
N
ncollingridge
119 months ago
I'm still waiting to hear that PDFKit has been fixed before upgrading to Sierra. Why the total radio silence on this issue from all directions?
Score: 1 Votes (Like | Disagree)
Read All Comments

🔗 Related Apple News & Rumors

Stay updated with the latest Apple ecosystem news and verified rumors