Apple today seeded the eighth beta of macOS 10.15 Catalina to developers, two weeks after seeding the seventh macOS Catalina beta and over two months 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 after installing the proper software from the Developer Center.

test macOS 10
macOS Catalina eliminates the iTunes app, splitting it into Music, Podcasts, and TV apps. 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. Apple will release macOS Catalina sometime in October.

Related Forum: macOS Catalina

Top Rated Comments

schlitzz Avatar
82 months ago
Seriously?!?

https://www.apple.com/macos/catalina/
"SIRIously". Dammit people, get it right.
Score: 4 Votes (Like | Disagree)
TheSkywalker77 Avatar
82 months ago
The default Catalina wallpaper is fully dynamic now. And they added a bunch of scenic shots of the Catalina island.
Score: 4 Votes (Like | Disagree)
Mike Haas Avatar
82 months ago
And THAT is NOT a mess???
How much of a fan boy one has to be...
Why do people believe stories like this? Don't get me wrong - I think he really believes what he wrote, but an OS install doesn't cause that kind of damage or prevent one from upgrading their machine. The issues lie with the person installing, not the software and from what I've read here over the years regarding various beta releases, some people should never install them at all.

During the course of this beta I've read some of the wildest stories imaginable - just like you read every single Summer beta cycle. The first and second betas had issues with the 2018/19 hardware, that was about it. I have a 13" 2017 MBP, no taskbar. My installs went without a hitch. I had issues with overheating and fan speeds, iCloud was a mess (still is, was, and probably always will be because Consumer-grade cloud services are crap by their very nature) and I'd even go so far as to say that the Mojave beta cycle was probably a lot cleaner.

It's a BETA - what do people not understand about this idea? Catalina is shaping up to be a great iteration of MacOS - what do people want? I know exactly what's going to happen. By about 15.5 or 6 Catalina will be humming right along and I'll be stupid enough to participate in the next beta cycle knowing exactly what I'm getting myself into...
Score: 4 Votes (Like | Disagree)
ghostface147 Avatar
82 months ago
I'm still waiting for Adobe to complete the Acrobat DC 64-bit transition. As of now, without using any tricks to install it, it opens and then closes on Catalina.
Score: 3 Votes (Like | Disagree)
SMGreenfield Avatar
82 months ago
Not "postponed", but I wondered the same thing: normally, the release date for the next OS is given at the early September event. It's usually towards the third week of September. Then, the next OS (15.0) gets released, and there's a scramble to correct all the unfound defects and push out a 15.1 and 15.2 in early October.

MAYBE Apple is thinking, "Mojave just got pretty stable (14.5, 14.6)." There's no rush -- let's push the release of 15.x Catalina until the October event, where they release the new MacBooks (like 16" MacBook) and the finally-released Mac Pro, and whatever their Tile-competitor tracking tag is. That way, they have a whole event that doesn't compete with all the stuff they announced today, and Catalina gets and additional 3 - 5 weeks of road testing.

Anyone else think that's what's going to happen?
Score: 2 Votes (Like | Disagree)
SMGreenfield Avatar
82 months ago
I have few 32 bits apps I wonder if someone will create a patch to run those apps natively instead of doing it on a VM
A PATCH? I don't think any "patch" would work -- all the 32-bit Carbon code has been removed from Catalina.
Score: 2 Votes (Like | Disagree)

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 ...
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....
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,...
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...
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....
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....
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...
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...
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 17 Pro Cosmic Orange

10 Reasons to Wait for Next Year's iPhone 18 Pro

Monday December 1, 2025 2:40 am PST by
Apple's iPhone development roadmap runs several years into the future and the company is continually working with suppliers on several successive iPhone models at the same time, which is why we often get rumored features months ahead of launch. The iPhone 18 series is no different, and we already have a good idea of what to expect for the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth...