Apple Seeds Third Beta of macOS Sierra 10.12.5 to Developers and Public Beta Testers - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

Apple Seeds Third Beta of macOS Sierra 10.12.5 to Developers and Public Beta Testers

Apple today seeded the third beta of an upcoming macOS Sierra 10.12.5 update to developers, one week after seeding the second beta and three weeks after releasing macOS Sierra 10.12.4, which introduced Night Shift for the Mac.

The third beta of macOS Sierra 10.12.5 can be downloaded through the Apple Developer Center or through the Software Update mechanism in the Mac App Store.

macOS 10
According to the release notes accompanying the beta, the update "improves the stability, compatibility, and security of your Mac."

Apple's release notes don't often provide a lot of insight into what's included in new beta software, so we don't know what features or bug fixes might be included in the 10.12.5 update.

No notable changes or major bug fixes were discovered in the first two betas, but should anything pop up in the third macOS Sierra 10.12.5 beta, we'll update this post.

Update: Beta 3 is also out for public beta testers.

Related Forum: macOS Sierra

Popular Stories

iPhone 18 Pro and Pro Max Feature

'Apple Upgrade' Program Reportedly Launching Next Week

Tuesday July 21, 2026 8:30 am PDT by
Apple and Klarna are partnering on a new "Apple Upgrade" leasing program set to launch in the U.S. on Tuesday, July 28, according to Bloomberg's Mark Gurman. The program will allow you to finance most iPhone, iPad, Mac, and Apple Watch models, with a 24-month term for iPhones and Apple Watches and a 36-month term for iPads and Macs. Customers will be able to pay off the device early during...
iPhone 18 Pro Deep Red Feature

iPhone 18 Pro Launching in Two Months With These 12 New Features

Tuesday July 21, 2026 6:22 am PDT by
It is now mid-July, and that means the iPhone 18 Pro and iPhone 18 Pro Max are now just two months away. The devices are expected to look similar to the iPhone 17 Pro and iPhone 17 Pro Max, but there will still be many year-over-year changes, with rumored features including a smaller Dynamic Island, 5G via satellite, and more. Apple is expected to unveil the iPhone 18 Pro, iPhone 18 Pro Max, ...
iPhone 18 Pro Deep Red Feature

iPhone 18 Pro Launching in Two Months With These 12 New Features

Friday July 17, 2026 10:39 am PDT by
It is now mid-July, and that means the iPhone 18 Pro and iPhone 18 Pro Max are now just two months away. The devices are expected to look similar to the iPhone 17 Pro and iPhone 17 Pro Max, but there will still be many year-over-year changes, with rumored features including a smaller Dynamic Island, 5G via satellite, and more. Apple is expected to unveil the iPhone 18 Pro, iPhone 18 Pro Max, ...

Top Rated Comments

121 months ago
Quick question: Do these beta updates really need to be front page news?

Unless they reveal something incredible (like a hidden new Mac model) they're not really that newsworthy to the vast majority of people.
Quick answer: Yes.

I like to see it on the front page to inform me that the new betas are available.

Sometimes I see other news articles on the front page that are not relevant to me and I just skip them. I don't then complain about their existence merely because they are not relevant to me.
Score: 15 Votes (Like | Disagree)
xgman Avatar
121 months ago
I appreciate betas being announced on the front page. Is it really so offensive to just skip by it if you aren't interested?
Score: 8 Votes (Like | Disagree)
121 months ago
"improves the stability, compatibility, and security of your Mac."

This is so generic, why can't they just say what it fixes? We don't need security info notes but other specific info for the user would be good. Time for a change in language?
Score: 5 Votes (Like | Disagree)
redheeler Avatar
121 months ago
Quick question: Do these beta updates really need to be front page news?

Unless they reveal something incredible (like a hidden new Mac model) they're not really that newsworthy to the vast majority of people.
I really don't mind, just as long as they don't do something like putting iOS on the front page and pushing MacOS to the Mac Blog.
Score: 4 Votes (Like | Disagree)
DHagan4755 Avatar
121 months ago
Quick question: Do these beta updates really need to be front page news?

Unless they reveal something incredible (like a hidden new Mac model) they're not really that newsworthy to the vast majority of people.
Score: 4 Votes (Like | Disagree)
forerunnerg34 Avatar
121 months ago
Quick question: Do these beta updates really need to be front page news?

Unless they reveal something incredible (like a hidden new Mac model) they're not really that newsworthy to the vast majority of people.
Well, there are not many news from Apple worthy of anything, so why not to put it on the front page since there is nothing else to talk about.
Score: 3 Votes (Like | Disagree)