Apple Seeds Sixth Beta of macOS Catalina to Developers [Update: Public Beta Available]

Apple today seeded the sixth beta of macOS 10.15 Catalina for testing purposes, more than two weeks after seeding the fifth macOS Catalina beta and over a month after the new Mac operating system update was first unveiled at the Worldwide Developers Conference.

The new macOS Catalina beta can be downloaded using the Software Update mechanism in System Preferences. As with all new betas, macOS Catalina should not be installed on a primary machine because it is early release software and has bugs.

test macOS 10
macOS Catalina eliminates the iTunes app, splitting it into Music, Podcasts, and TV apps. The Apple Music and Apple Podcasts apps are available now, while the Apple TV app is coming later this year.

The three new apps offer similar functionality to iTunes, but are split up by feature. iOS device management is still available on the Mac, but it's now done through the Finder rather than iTunes.

With a new Sidecar feature, you can turn your iPad into a second display for your Mac with just the click of a button. The Apple Pencil works with ‌Sidecar‌, so you can turn your ‌iPad‌ into a drawing tablet in apps like Photoshop and Illustrator.

Your Apple Watch can be used to approve security prompts for passwords and other info in macOS Catalina, and Macs with a T2 chip now support Activation Lock, making them more secure. There's a new Find My that brings the ‌Find My‌ Mac app to the Mac for the first time and even lets you track your devices when they're offline, or, in the case of notebooks, closed.

Screen Time is available on the Mac as well as iOS devices, and Project Catalyst, a new Apple initiative, will let developers easily port their ‌iPad‌ apps over to the Mac to increase the number of Mac apps available.

There's a new Photos interface that surfaces your best photos organized by day, month, or year, there's a new start page in Safari, Mail has new tools for muting email threads and blocking senders, and the Reminders app has been overhauled. 32-bit apps no longer work in macOS Catalina, which is something to be aware of before installing the beta.

For more details on macOS Catalina, make sure to check out our macOS Catalina roundup.

Update: Apple has also made a new public beta of macOS Catalina available to public beta testers.

Related Forum: macOS Catalina

Popular Stories

iOS 26

When Will Apple Release iOS 26.2?

Monday December 1, 2025 4:37 pm PST by
We're getting closer to the launch of the final major iOS update of the year, with Apple set to release iOS 26.2 in December. We've had three betas so far and are expecting a fourth beta or a release candidate this week, so a launch could follow as soon as next week. Past Launch Dates Apple's past iOS x.2 updates from the last few years have all happened right around the middle of the...
maxresdefault

iPhone Fold: Launch, Pricing, and What to Expect From Apple's Foldable

Monday December 1, 2025 3:00 am PST by
Apple is expected to launch a new foldable iPhone next year, based on multiple rumors and credible sources. The long-awaited device has been rumored for years now, but signs increasingly suggest that 2026 could indeed be the year that Apple releases its first foldable device. Subscribe to the MacRumors YouTube channel for more videos. Below, we've collated an updated set of key details that ...
Sad Siri Feature

Apple AI Chief John Giannandrea Retiring After Siri Delays

Monday December 1, 2025 2:16 pm PST by
Apple AI chief John Giannandrea is stepping down from his position and retiring in spring 2026, Apple announced today. Giannandrea will serve as an advisor between now and 2026, with former Microsoft AI researcher Amar Subramanya set to take over as vice president of AI. Subramanya will report to Apple engineering chief Craig Federighi, and will lead Apple Foundation Models, ML research, and ...
Netflix Smaller 4

Netflix Kills Casting From Its Mobile App to Most Modern TVs

Monday December 1, 2025 4:36 am PST by
Netflix has quietly removed the ability to cast content from its mobile apps to most modern TVs and streaming devices, including newer Chromecast models and the Google TV Streamer. The change was first spotted by users on Reddit and confirmed in an updated Netflix support page (via Android Authority), which now states that the streaming service no longer supports casting from mobile devices...
ios 18 to ios 26 upgrade

Apple Pushes iPhone Users Still on iOS 18 to Upgrade to iOS 26

Tuesday December 2, 2025 11:09 am PST by
Apple is encouraging iPhone users who are still running iOS 18 to upgrade to iOS 26 by making the iOS 26 software upgrade option more prominent. Since iOS 26 launched in September, it has been displayed as an optional upgrade at the bottom of the Software Update interface in the Settings app. iOS 18 has been the default operating system option, and users running iOS 18 have seen iOS 18...
Touchscreen MacBook Feature

Here Are the Four MacBooks Apple Is Expected to Launch Next Year

Monday December 1, 2025 5:00 am PST by
2026 could be a bumper year for Apple's Mac lineup, with the company expected to announce as many as four separate MacBook launches. Rumors suggest Apple will court both ends of the consumer spectrum, with more affordable options for students and feature-rich premium lines for users that seek the highest specifications from a laptop. Below is a breakdown of what we're expecting over the next ...
iphone 17 cyber

iPhone 17 Demand Is Breaking Apple's Sales Records

Tuesday December 2, 2025 9:44 am PST by
Apple's iPhone 17 lineup is selling well enough that Apple is on track to ship more than 247.4 million total iPhones in 2025, according to a new report from IDC. Total 2025 shipments are forecast to grow 6.1 percent year over year due to iPhone 17 demand and increased sales in China, a major market for Apple. Overall worldwide smartphone shipments across Android and iOS are forecast to...
Cyber Week Deals 2025

Best Cyber Week Apple Deals Include Big Discounts on AirPods, Apple Watch, and More

Sunday November 30, 2025 7:33 am PST by
Cyber Week is here, and you can find popular Apple products like AirPods, iPad, Apple Watch, and more at all-time low prices. In this article, the majority of the discounts will be found on Amazon. Note: MacRumors is an affiliate partner with some of these vendors. When you click a link and make a purchase, we may receive a small payment, which helps us keep the site running. Specifically,...
iOS 26

What to Expect From Apple This December: iOS 26.3 Beta, Replay 2025, and More

Monday December 1, 2025 8:40 am PST by
The calendar has turned to December, and the quieter year-end holiday season is now upon us. Nevertheless, we can still expect a few things from Apple this month. Apple previously announced that iOS 26.2 will be released to the general public in December, and we can expect corresponding updates to be released as well, including iPadOS 26.2, macOS 26.2, watchOS 26.2, tvOS 26.2, and visionOS...
studio display purple february

M5 iPad Pro Could Hint at New Studio Display Feature

Sunday November 30, 2025 10:30 am PST by
The updated specs of the M5 iPad Pro may point toward a major new feature for Apple's next-generation Studio Display expected in early 2026. Apple's latest iPad Pro debuted last month and contains one display-related change that stands out: it can now drive external monitors at up to 120Hz with Adaptive Sync. The feature should deliver lower latency, smoother motion, and fewer visual...

Top Rated Comments

PastaPrimav Avatar
82 months ago
Well I'd say its about time, but it probably took them the last 2 weeks to install it in house.
Score: 16 Votes (Like | Disagree)
ErikGrim Avatar
82 months ago
Baffled to why anyone would prefer either Firefox or Chrome over Safari.
Score: 9 Votes (Like | Disagree)
Chris The Bipolarbear Avatar
82 months ago
just installed Firefox and can confirm that this is now working.
Score: 9 Votes (Like | Disagree)
adrianlondon Avatar
82 months ago
Baffled to why anyone would prefer either Firefox or Chrome over Safari.
I find Firefox much faster than Safari. For me, whether I use stock Safari or Safari Tech Preview, it likes to redraw the screen whenI swipe back on most forum websites. Including this one. I swipe back, wait a second or two and then it redraws. If I click on something without being patient, and the reload moves the forum topics around, I end up opening a topic I didn't intend to click on.

Plus, I don't like Safari's cookie control. Nor the way the tabs shrink in size as you open more of them. And many other UI things I've come to like about Firefox. Ah yes, it also loads complex Youtube pages much quicker. And I can use uBlock Origin.
Score: 8 Votes (Like | Disagree)
GadgetBen Avatar
82 months ago
Public Beta now available.



Attachment Image
Score: 5 Votes (Like | Disagree)
chrisdazzo Avatar
82 months ago
Confirming. Build 19A536g on Dev Console. Release notes also already up for b6.


Interesting tidbits:

* Music: "Artwork changes now appear immediately; playlists have been added."
* Photos: still doing the database clone/backup thing, with deletion and correction later on.
* App Store: "You no longer receive an error when downloading or updating apps."


Attachment Image
Score: 5 Votes (Like | Disagree)