Apple Releases Second macOS Sierra 10.12.3 Beta for Public Beta Testers - MacRumors
Skip to Content

Apple Releases Second macOS Sierra 10.12.3 Beta for Public Beta Testers

by

Apple today seeded the second beta of an upcoming macOS Sierra 10.12.3 update to public beta testers, one week after seeding the first public beta and one day after seeding the second 10.12.3 beta to developers.

Beta testers who have signed up for Apple's beta testing program will receive the 10.12.3 macOS Sierra beta through the Software Update mechanism in the Mac App Store.

Those who want to be a part of Apple's beta testing program can sign up to participate through the beta testing website, which gives users access to both iOS and macOS Sierra betas. Betas should not be installed on a primary machine due to the potential for instability.

macos-10-12-3-beta
According to Apple's release notes, the 10.12.3 update "improves the stability, compatibility, and security of your Mac." No specific changes, bug fixes, or feature additions were discovered in the first two developer betas.

Related Forum: macOS Sierra

Top Rated Comments

verpeiler Avatar
verpeiler
123 months ago
..miss the times when beta update were exciting. Now I don't even know wtf has changed or was fixed.
Score: 3 Votes (Like | Disagree)
Internet Enzyme Avatar
Internet Enzyme
123 months ago
..miss the times when beta update were exciting. Now I don't even know wtf has changed or was fixed.
I wish Apple had a changelog for these. Even if they changed the most minute of things, they still should list it. I don't wanna see that it improves system stability and fixes bugs. I wanna know what bugs it fixes and how it improves system security. It seems like I update my mac every week, and each time it takes like 20 minutes, and comes out the other side completely unchanged. What is the point of a beta program then?
Score: 2 Votes (Like | Disagree)
C
C DM
122 months ago
When is it expected to be generally released? I'm hoping it fixes this issue on or before Jan 5. Otherwise, I will have consider returning my machine.
https://forums.macrumors.com/threads/2nd-mbp-ntb-with-display-issues-what-to-do.2021948/
No real expectations. That said, with it being the holiday season, more than likely nothing will happen as far as any final public releases before Jan. 5, and likely some weeks after that.
Score: 1 Votes (Like | Disagree)
Read All Comments

Popular Stories

General Apps Reddit Feature

Reddit Starts Blocking Mobile Website, Pushing Users to App Instead

Monday May 11, 2026 6:10 am PDT by
Social network Reddit recently began blocking mobile visitors to its website while pushing them to download the official Reddit app, and it's fair to say that the move is not going down well with users. If you visit reddit.com on your iPhone today, you may see a new popup that can't be dismissed, asking you to "get the app to keep using Reddit." A Reddit spokesperson told Ars Technica...
Read Full Article • 119 comments
Four iPhone 18 Pro Colors Mock Feature

iPhone 18 Pro Launching in September With These 10 New Features

Saturday May 9, 2026 6:03 am PDT by
While the iPhone 18 Pro and iPhone 18 Pro Max are not launching until September, there are already plenty of rumors about the devices. It was initially reported that the iPhone 18 Pro models would have fully under-screen Face ID, with only a front camera visible in the top-left corner of the screen. However, the latest rumors indicate that only one Face ID component will be moved under the...
Read Full Article
MacBook Pro Low Angle Wide Lens

macOS 27: Two More Changes Leaked Ahead of WWDC Next Month

Sunday May 10, 2026 9:45 am PDT by
macOS 27 will have a "slight redesign" compared to macOS Tahoe, according to the latest word from Bloomberg's Mark Gurman. In his Power On newsletter today, Gurman said the design changes will help to improve the readability of macOS Tahoe's Liquid Glass interface:If you've used Tahoe, you're likely familiar with some of the quirks — particularly the transparency effects and shadows that...
Read Full Article • 155 comments