Apple Seeds Fifth Beta of macOS High Sierra 10.13.3 to Developers [Update: Public Beta Available] - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

Apple Seeds Fifth Beta of macOS High Sierra 10.13.3 to Developers [Update: Public Beta Available]

Apple today seeded the fifth beta of an upcoming macOS High Sierra 10.13.3 update to developers, one week after seeding the fourth beta and more than a month after releasing macOS High Sierra 10.13.2, the second major update to the macOS High Sierra operating system.

The new macOS High Sierra 10.13.3 beta can be downloaded from the Apple Developer Center or through the Software Update mechanism in the Mac App Store with the proper profile installed.

macoshighsierra10133beta
It's not yet clear what improvements the macOS High Sierra 10.13.3 update will bring, but it's likely to include bug fixes and performance improvements for issues that weren't addressed in macOS High Sierra 10.13.2. It offers additional fixes for the Spectre and Meltdown vulnerabilities that were discovered and publicized in early January and fixed initially in macOS High Sierra 10.13.2.

The update also fixes a bug that allows the App Store menu in the System Preferences to be unlocked with any password.

The previous macOS High Sierra 10.13.2 update focused solely on security fixes and performance improvements, with no new features introduced, and a supplemental update introduced a fix for the Spectre vulnerability.

Update: A new public beta of macOS High Sierra 10.13.3 is available for public beta testers.

Related Forum: macOS High 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...
iOS 27 Icon iPhone

iOS 27 Available Today With These 8 New Features

Monday September 14, 2026 9:00 am PDT by
Update: 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 changes coming with iOS...
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...

Top Rated Comments

113 months ago
I sure hope so! As a matter of fact, I am really hoping Apple does not release 10.14. this summer and just focuses on fixing the loooong list of bugs in this operating system.
Same with iOS. We need a snow leopard year for software. Only for them to just screw it all up again with tons of bugs in the next cycle but it would be nice to delay the pain. Haha.
Yeah, they really need to increase the new OS cycle to 2-3 years and not every year. It seems like by the time they get all the wrinkles ironed out, they release a new bug-filled OS that we have to wait another year to not be so buggy again. It's annoying.
Score: 11 Votes (Like | Disagree)
113 months ago
It's not yet clear what improvements the macOS High Sierra 10.13.3 update will bring, but it's likely to include bug fixes and performance improvements for issues that weren't addressed in macOS High Sierra 10.13.2.
I sure hope so! As a matter of fact, I am really hoping Apple does not release 10.14. this summer and just focuses on fixing the loooong list of bugs in this operating system.
Score: 9 Votes (Like | Disagree)
N0ughtsAndCr0sses Avatar
113 months ago
God help us all!!!
Score: 9 Votes (Like | Disagree)
113 months ago
I am really hoping Apple does not release 10.14. this summer and just focuses on fixing the loooong list of bugs in this operating system.
The whole purpose off High Sierra was to fine tune Sierra. It is/was supposed to be a "snow leopard" type release... but has fallen short of that dream.
Score: 7 Votes (Like | Disagree)
113 months ago
I'll be installing it right away, upon release.

What.
Could.
Possibly.
Go.
Wrong.
Score: 7 Votes (Like | Disagree)
jonnyb098 Avatar
113 months ago
I sure hope so! As a matter of fact, I am really hoping Apple does not release 10.14. this summer and just focuses on fixing the loooong list of bugs in this operating system.
Same with iOS. We need a snow leopard year for software. Only for them to just screw it all up again with tons of bugs in the next cycle but it would be nice to delay the pain. Haha.
Score: 6 Votes (Like | Disagree)

🔗 Related Apple News & Rumors

Stay updated with the latest Apple ecosystem news and verified rumors