Apple Seeds Second Beta of macOS Catalina to Developers

Apple today seeded the second beta of macOS 10.15 Catalina for testing purposes, two weeks 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, you're not going to want to install macOS Catalina on a primary machine as it is early release software and could have major 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 new apps are similar in function to iTunes, but are split up by feature. iOS device management is still available on the Mac, but it's now done through 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 in macOS Catalina, and Macs with a T2 chip support Activation Lock. 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.

Screen Time is now 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.

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. Right now, Catalina is limited to developers, but Apple plans to release a public beta in July ahead of a fall public launch.

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

Related Forum: macOS Catalina

Popular Stories

iOS 26

15 New Things Your iPhone Can Do in iOS 26.2

Friday December 5, 2025 9:40 am PST by
Apple is about to release iOS 26.2, the second major point update for iPhones since iOS 26 was rolled out in September, and there are at least 15 notable changes and improvements worth checking out. We've rounded them up below. Apple is expected to roll out iOS 26.2 to compatible devices sometime between December 8 and December 16. When the update drops, you can check Apple's servers for the ...
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...
iOS 26

Apple Seeds iOS 26.2 and iPadOS 26.2 Release Candidates to Developers and Public Beta Testers

Wednesday December 3, 2025 10:33 am PST by
Apple today seeded the release candidate versions of upcoming iOS 26.2 and iPadOS 26.2 updates to developers and public beta testers, with the software coming two weeks after Apple seeded the third betas. The release candidates represent the final versions of iOS 26.2 and iPadOS 26.2 that will be provided to the public if no further bugs are found during this final week of testing....
Photos App Icon Liquid Glass

John Gruber Shares Scathing Commentary About Apple's Departing Software Design Chief

Thursday December 4, 2025 9:30 am PST by
In a statement shared with Bloomberg on Wednesday, Apple confirmed that its software design chief Alan Dye will be leaving. Apple said Dye will be succeeded by Stephen Lemay, who has been a software designer at the company since 1999. Meta CEO Mark Zuckerberg announced that Dye will lead a new creative studio within the company's AR/VR division Reality Labs. On his blog Daring Fireball,...
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 ...
iphone air camera

iPhone Air's Resale Value Has Dropped Dramatically, Data Shows

Thursday December 4, 2025 5:27 am PST by
The iPhone Air has recorded the steepest early resale value drop of any iPhone model in years, with new data showing that several configurations have lost almost 50% of their value within ten weeks of launch. According to a ten-week analysis published by SellCell, Apple's latest lineup is showing a pronounced split in resale performance between the iPhone 17 models and the iPhone Air....
ive and altman

Jony Ive's OpenAI Device Barred From Using 'io' Name

Friday December 5, 2025 6:22 am PST by
A U.S. appeals court has upheld a temporary restraining order that prevents OpenAI and Jony Ive's new hardware venture from using the name "io" for products similar to those planned by AI audio startup iyO, Bloomberg Law reports. iyO sued OpenAI earlier this year after the latter announced its partnership with Ive's new firm, arguing that OpenAI's planned "io" branding was too close to its...
iPhone 17 Pro Cosmic Orange

iPhone 17 Pro Lost a Camera Feature Pro Models Have Had Since 2020

Thursday December 4, 2025 5:18 am PST by
iPhone 17 Pro models, it turns out, can't take photos in Night mode when Portrait mode is selected in the Camera app – a capability that's been available on Apple's Pro devices since the iPhone 12 Pro in 2020. If you're an iPhone 17 Pro or iPhone 17 Pro Max owner, try it for yourself: Open the Camera app with Photo selected in the carousel, then cover the rear lenses with your hand to...
Intel Inside iPhone Feature

Apple's Return to Intel Rumored to Extend to iPhone

Friday December 5, 2025 10:08 am PST by
Intel is expected to begin supplying some Mac and iPad chips in a few years, and the latest rumor claims the partnership might extend to the iPhone. In a research note with investment firm GF Securities this week, obtained by MacRumors, analyst Jeff Pu said he and his colleagues "now expect" Intel to reach a supply deal with Apple for at least some non-pro iPhone chips starting in 2028....

Top Rated Comments

Cyberpower678 Avatar
85 months ago
Finder is a bit slow and finicky, unlike Beta 1. I found Home Sharing and enabled it but I cannot connect to my film and TV libraries through the Apple TV app on the phone (running iOS 13) or the Apple TV, running 12.3. I made sure I was logged into iCloud and that Home Sharing was enabled. On the phone I get "There was a problem playing this content" and on the TV, the library comes up but the error message is, "Cannot connect to shared libraries." My shared music library plays, however.

I know I can't get that excited about these issues running a Beta but if anyone else got this working, let me know. Thanks!
Turn your iCloud off and back on. That might fix your issues.
[doublepost=1560875145][/doublepost]
I will never understand why every new OS results in the wholesale breaking of things that were working just fine prior. How is this progress? Seems more like a study in user aggravation.
Spoken like a non-developer. ;). When major changes are made and core sub-routines updates to improve efficiency, it can introduce breakages in places that aren’t immediately expected to break in. MacOS is large and sometime a core routine needs to be altered to implement the new features being introduced. Otherwise macOS would be just one big patch job. We might as well be using Windows at that point.
Score: 4 Votes (Like | Disagree)
Chris Grande Avatar
85 months ago
I'd like to see them bring back home sharing - at least by the final build.
It's in there, it's just been moved to System Preferences -> Sharing -> Media Sharing.
Score: 4 Votes (Like | Disagree)
DesertNomad Avatar
85 months ago
I wish they'd fix NSPredicateEditor when it is displayed in a sheet. It has been broken since at least the initial release of 10.14. I guess they are more interested in designing new emojis rather than fixing core parts of the OS.

I've been developing software for the Apple/Mac platform since 1985 and it's sad to see the state of Apple today. Lots of broken parts of the OS will likely never be fixed.
Score: 3 Votes (Like | Disagree)
cponto Avatar
85 months ago
I'd like to see them bring back home sharing - at least by the final build.
Home Sharing works well with Catalina Beta 1

Attachment Image
Score: 3 Votes (Like | Disagree)
zorinlynx Avatar
85 months ago
Time Machine supporting APFS disks?
I don't know why this isn't a thing yet. APFS supports snapshot streams and incremental snapshot streams. This would be absolutely ideal for Time Machine and probably hundreds of times faster than the current way which is basically an rsync with hard linked directories.
Score: 3 Votes (Like | Disagree)
Chris The Bipolarbear Avatar
85 months ago
6.45 GB - about 3 hours remaining. Yeah, I figured Beta 2 would be popular...
it a complete new installer even has a pretty picture on it

Attachment Image
Score: 3 Votes (Like | Disagree)