Apple Seeds Sixth Beta of macOS Sierra 10.12.6 to Developers and Public Beta Testers - MacRumors
Skip to Content

Apple Seeds Sixth Beta of macOS Sierra 10.12.6 to Developers and Public Beta Testers

by

Apple today seeded the sixth beta of an upcoming macOS Sierra 10.12.6 update to developers and public beta testers, one week after seeding the fifth beta and more than a month after releasing macOS Sierra 10.12.5, a minor bug fix update.

The sixth beta of 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
We didn't find any significant feature changes, design tweaks, or notable bug fixes in the first five macOS Sierra 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.

Related Forum: macOS Sierra

Popular Stories

iOS 27 Next to iPhone

Here's When iOS 27 Rolls Out Today in Every Time Zone [Update: It's Out]

Sunday September 13, 2026 3:00 am PDT by
Update 10:04 a.m.: iOS 27 is rolling out now, though it may take a bit for all users to see it, so keep checking! Apple is about to release iOS 27, which will finally deliver more advanced Siri AI capabilities as well as a variety of other refinements, improvements, and new features to iPhones. It's Apple's biggest software update of the year, and Apple announced at Wednesday's iPhone event...
Read Full Article • 151 comments
iOS 27 Icon iPhone

iOS 27 Available Now With These 8 New Features

Monday September 14, 2026 9:00 am PDT by
Update — 10 a.m. Pacific Time: Apple has released iOS 27. During its iPhone 18 Pro and iPhone Duo event last week, Apple announced that iOS 27 will be released widely on Monday, September 14. iOS 27 should be available around 10 a.m. Pacific Time / 1 p.m. Eastern Time today via the Settings app, under General → Software Update. Below, we have highlighted eight new features and...
Read Full Article • 111 comments
deep black iphone 18 pro

Apple Says iPhone 18 Pro Max Sold in U.S. Differs in One Way

Saturday September 12, 2026 3:27 pm PDT by
As noted by Nicolas Lellouche, who writes for the French tech website Numerama, Apple has updated its tech specs pages for the iPhone 18 Pro and iPhone 18 Pro Max to clarify which models are equipped with its new C2 cellular modem and where. Apple now says the iPhone 18 Pro has a C2 modem worldwide, while the iPhone 18 Pro Max uses the chip in every country except for the U.S. According...
Read Full Article • 142 comments

Top Rated Comments

fhall1 Avatar
fhall1
120 months ago
It's final: the impatience for High Sierra (nobody asks for a rock solid 10.12.6, it's only gimme High Sierra, gimme High Sierra,... ) shows that Apple has changed because the users have changed. Sigh.
I want a rock solid 10.12.6 so I can finally migrate from 10.11.6
Score: 3 Votes (Like | Disagree)
A
asiga
120 months ago
I want a rock solid 10.12.6 so I can finally migrate from 10.11.6
Same boat here. I might even skip High Sierra completely and go directly to the next MacOS, so that the new filesystem has been tested in production use for at least two years (which means summer 2019, because I'm updating in summer these years, at the last version for each MacOS release).

The only exception would be if I buy a new Mac that requires High Sierra sometime in the next months. But I prefer to wait until there's either a MacBook with an screen larger than 12'', or a 13'' MacBook Pro at 1Kg (I don't really care if they call it MacBook or MacBook Pro, I just want a 13'' or 14'' display at 1Kg). So, back to the point, yes, I'd like to skip High Sierra, and keep calm until summer 2019.
Score: 2 Votes (Like | Disagree)
M
MrGuder
120 months ago
I did, too. IMHO, stupid of Apple to not give 10.13 a different name than High Sierra, as people will easily confuse it with Sierra.
My personal opinion is because High Sierra will sorta be like a testing phase for Apple and its customers using all the supporting systems that High Sierra will work on. It gives them a year to fully test it out with Safari and all the coding and video enhancements.

If for some reason High Sierra doesn't go well then by next year they will assign a new name to the operating system and any negativity associated with High Sierra won't be associated with the new operating system name next fall.
Score: 2 Votes (Like | Disagree)
MrGimper Avatar
MrGimper
120 months ago
Oh.... How many people thought this was iOS 11/High Sierra
Score: 2 Votes (Like | Disagree)
PBG4 Dude Avatar
PBG4 Dude
120 months ago
Well, there will be security fixes for 2-3 years going forward so it isn't the last patch, just the last patch where they're actively working to improve the OS.
Score: 1 Votes (Like | Disagree)
jmgregory1 Avatar
jmgregory1
120 months ago
Why not? Two weeks since the last beta already.
The 4th of July holiday week screws things up, as I'm sure a lot of people took extra time off.
Score: 1 Votes (Like | Disagree)
Read All Comments