Apple today seeded the fourth beta of an upcoming macOS Mojave 10.14.3 update to developers and public beta testers, a few days after releasing the third beta and more than a month after the launch of macOS Mojave 10.14.2.

The new macOS Mojave 10.14.3 beta can be downloaded through the Software Update mechanism in System Preferences after the proper profile has been installed from Apple's Developer Center or the public beta testing site.

macbookairmojave
We don't yet know what improvements the next update to macOS Mojave will bring, but it is likely to include bug fixes and performance improvements for issues that weren't able to be addressed in the macOS 10.14.2 update.

No new features were found in the first three betas of macOS 10.14.3, but if we find anything new in the fourth beta, we'll update this post.

Related Forum: macOS Mojave

Top Rated Comments

BigBoy2018 Avatar
90 months ago
The new Macbook Air does include a T2 chip. https://www.apple.com/macbook-air/

My 2018 mini has the T2 chip as well, but I have had no issues with it using Mojave.

As for Mojave, it has been rock solid on both my personal minis as well as my work mac pro 2012 and macbook air 2014.

I have no doubt it will be 'rock solid' for almost everyone. The issue is, when the time comes you want to replace or upgrade the storage drive in any of the T2 chip equipped macs, you can pretty much forget about it and just get a new motherboard or replace the computer entirely.

I fix Macs as a hobby. And I can't tell you how many Macs I've got running again for several years just but swapping out the faulty storage drive (ssd or hdd).

That will no longer be possible with 'T' chip equipped Macs, which is disappointing to say the least.
Score: 3 Votes (Like | Disagree)
jfischer Avatar
90 months ago

I'd like to know if the Air also has the T2 and how are people finding it.
I have a brand-new Air with the TouchID, so I presume it has the T2. So far it's been working fine. Had one or two WiFi disconnects with it over the first few weeks but other than that it's been solid. Upgraded from an OG 12" MacBook, so for me the Air is a huge upgrade as well as far as speed.
Score: 2 Votes (Like | Disagree)
Jack Neill Avatar
90 months ago
10.14.2 has been so rock solid for me. I love how it can only get better. The iOS 12/Mojave cycle has been a real step forward for Apple software quality, in my opinion of course.
Score: 2 Votes (Like | Disagree)
Konigi Avatar
90 months ago
Is there a reason why they never state what's in the beta?
Score: 2 Votes (Like | Disagree)
tywebb13 Avatar
90 months ago
Build number is 18D39a
Score: 1 Votes (Like | Disagree)
xflashx Avatar
90 months ago
But... I just updated to beta 3 o_O
Score: 1 Votes (Like | Disagree)

Popular Stories

apple store down feature

Here's Why the Apple Store is Going Down

Thursday November 27, 2025 1:01 pm PST by
Apple's online store is going down for a few hours on a rolling country-by-country basis right now, but do not get your hopes up for new products. Apple takes its online store down for a few hours ahead of Black Friday every year to tease/prepare for its annual gift card offer with the purchase of select products. The store already went down and came back online in Australia and New Zealand, ...
iPhone Pocket Short

iPhone Pocket is Now Completely Sold Out Worldwide

Tuesday November 25, 2025 7:16 am PST by
Apple recently teamed up with Japanese fashion brand ISSEY MIYAKE to create the iPhone Pocket, a limited-edition knitted accessory designed to carry an iPhone. However, it is now completely sold out in all countries where it was released. iPhone Pocket became available to order on Apple's online store starting Friday, November 14, in the United States, France, China, Italy, Japan, Singapore, ...
New Intel Logo

Apple and Intel Rumored to Partner on Mac Chips Again in a New Way

Friday November 28, 2025 7:33 am PST by
While all Macs are now powered by Apple's custom-designed chips, a new rumor claims that Apple may rekindle its partnership with Intel, albeit in a new and limited way. Apple supply chain analyst Ming-Chi Kuo today said Intel is expected to begin shipping Apple's lowest-end M-series chip as early as mid-2027. Kuo said Apple plans to utilize Intel's 18A process, which is the "earliest...
streaming black friday 2025

Best Black Friday Streaming Deals - Save Big on Apple TV, Disney+, Hulu, and More

Thursday November 27, 2025 1:14 pm PST by
We've been focusing on deals on physical products over the past few weeks, but Black Friday is also a great time of year to purchase a streaming membership. Some of the biggest services have great discounts for new and select returning members this week, including Apple TV, Disney+, Hulu, Paramount+, Peacock, and more. Note: MacRumors is an affiliate partner with some of these vendors. When...
Apple Foldable Thumb

Foldable iPhone to Debut These Three Breakthrough Features

Tuesday November 25, 2025 7:09 am PST by
Apple's first foldable iPhone is expected to launch alongside the iPhone 18 Pro models in fall 2026, and it's shaping up to include three standout features that could set it apart from the competition. The book-style foldable will reportedly feature an industry-first 24-megapixel under-display camera built into the inner display, according to a recent JP Morgan equity research report. That...
iphone air camera

iPhone Air Flop Sparks Industry Retreat From Ultra-Thin Phones

Thursday November 27, 2025 3:14 am PST by
Apple's disappointing iPhone Air sales are causing major Chinese mobile vendors to scrap or freeze their own ultra-thin phone projects, according to reports coming out of Asia. Since the ‌iPhone Air‌ launched in September, there have been reports of poor sales and manufacturing cuts, while Apple's supply chain has scaled back shipments and production. Apple supplier Foxconn has...
iphone black friday gold

The Best Black Friday iPhone Deals Still Available

Friday November 28, 2025 6:24 am PST by
Cellular carriers have always offered big savings on the newest iPhone models during the holidays, and Black Friday 2025 sales have kicked off at AT&T, Verizon, T-Mobile, and more. Right now we're tracking notable offers on the iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, and iPhone Air. For even more savings, keep an eye on older models during the holiday shopping season. Note: MacRumors is...