Apple Releases Fourth macOS Catalina Public Beta - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

Apple Releases Fourth macOS Catalina Public Beta

by

Apple today seeded the fourth beta of an upcoming macOS Catalina update to its public beta testing group, two weeks after seeding the third public beta and a day after seeding the fifth macOS Catalina developer beta.

Beta testers who have signed up for Apple's beta testing program will be able to download the macOS Catalina beta through the Software Update mechanism in System Preferences after installing the proper profile. Those who want to be a part of Apple's beta testing program can sign up to participate through the beta testing website, which gives users access to iOS, macOS, and tvOS betas.

test macOS 10
Potential beta testers should make a full Time Machine backup before installing macOS Catalina, and it may not be wise to install it on a primary machine because betas can be unstable and often have many bugs.

macOS Catalina eliminates the iTunes app, which has been a key Mac feature since 2001. In Catalina, iTunes has been replaced by Music, Podcasts, and TV apps. The new apps can do everything that iTunes can do, so Mac users aren't going to be losing any functionality, and device management capabilities are now handled by the Finder app.

macOS Catalina has a useful new Sidecar feature, designed to turn the iPad into a secondary display for the Mac. It can work as a traditional second display or with a mirroring feature. Apple Pencil support works with ‌Sidecar‌, so you can turn your ‌iPad‌ into a drawing tablet using apps like Photoshop.

sidecarmacoscatalina
For those with an Apple Watch set up to unlock the Mac, there's now an option to approve security prompts in Catalina by tapping on the side button of the watch. Macs with a T2 chip in them also support Activation Lock, making them useless to thieves much as it does on the iPhone.

There's a new Find My app that lets you track your lost devices, and previously, this functionality was only available via iCloud on the Mac. There's even a new option to find your devices even when they're offline by leveraging Bluetooth connections to other nearby devices, something that's particularly handy on the Mac because it doesn't have a cellular connection.

findmy
Apple is expanding Screen Time to the Mac in Catalina, letting Apple users track their device usage across Mac, iOS, and ‌iPad‌ for a better overall picture of time spent using electronics.

For developers, a "Project Catalyst" feature lets apps designed for the ‌iPad‌ be ported over to the Mac with just a few clicks in Xcode and some minor tweaks. Apple's ultimate goal with Project Catalyst is to bring more apps to the Mac.

Photos features an updated interface that better highlights your best pictures, Safari includes a new start page with Siri Suggestions, Mail has a new feature for blocking emails and another new option for muting threads, and the Reminders app has been overhauled and is now more useful.

macoscatalinaphotos
Before installing macOS Catalina, be aware that it does not support 32-bit apps, so some older apps that have not been updated in some time may stop working. For more on macOS Catalina, make sure to check out our macOS Catalina roundup.

Related Forum: macOS Catalina

Top Rated Comments

94 months ago
I have iOS/iPadOS 13 installed on my phone and iPad, but for some reason, I just can’t get myself to download a beta version of my computer OS. Looking forward to using it in about 6 weeks though.
Score: 4 Votes (Like | Disagree)
94 months ago
To those of you who haven’t installed the beta at all, and were planning on using it as your primary OS- I highly recommend that you continue to wait.
Score: 2 Votes (Like | Disagree)
94 months ago
I have tried enrolling and unenrolling several times. Still the software update dialog says, "requested update not found". I have also tried rebooting the machine but still no luck. Any advice? I'm running macOS Mojave 10.14.6
Score: 2 Votes (Like | Disagree)
macwinman Avatar
93 months ago
Thanks to JDRN, I at least understand half of what's going on now. Someone at Apple goofed -- if your computer is not already enrolled in the 10.15 beta, the enrollment tool that's available to download now won't work. Here's why.

If you go to beta.apple.com, login and then attempt to download the "Public Beta Access Utility", the link is pointing to this right now:

https://beta.apple.com/sp/downloads/projects/1001260/downloads/1010768

Clicking that link will download a DMG file. Double-click on the DMG file to mount the virtual volume. If you "get info" on the package inside this volume, you'll discover it was last modified on 05/30/18 -- yes, not 2019. If you install the package, it will set your Software Update catalog to this (I substituted https:// with XXXXX at the beginning because this editor keeps turning it into a hotlink if I leave it there):

[B]XXXXXswscan.apple.com/content/catalogs/others/index-10.14beta-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog.gz[/B]

Yes, this is the enrollment tool for the Mojave beta, not the Catalina beta. Oops! Want proof? Launch Terminal and execute this command to see where your Software Update is now pointed:

sudo defaults read /Library/Preferences/com.apple.SoftwareUpdate CatalogURL

You should see that "10.14beta" in the reply string.

Even though this installer is obsolete, you should still run it because it will create the SeedEnrollment file you need. Software Update will then check for updates and discover the "requested version of macOS is not available" since it's looking for the Mojave beta.

Once you receive that message, execute this command in Terminal to fix the the catalog location (again, where you see XXXXX substitute https:// because this board keeps trying to put a hotlink in the middle of my text!):

sudo /usr/sbin/softwareupdate --set-catalog XXXXXswscan.apple.com/content/catalogs/others/index-10.15beta-10.15-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog.gz

Check for updates again and you should now see the Catalina beta is available.

HOWEVER: for me, at least, all this did was allow me to download the latest beta installer onto my MacBook Pro (15-inch, 2019). I tried using it to make a bootable USB installer disk so I could do a complete clean install -- booting on this USB drive still produces the error message about needing to update my installer disk. I can see it's attempting to download what it needs to update my disk but it fails halfway through.

I submitted a report through the Feedback Assistant for both of these issues. Of course, I'm just one of the horde who's sending feedback about the beta. Anyone with a bonafide connection to Apple may want to drop them a line that their beta enrollment tool has been incorrectly downgraded.

As for the other issue, I wish someone would figure that out so I can actually use the new computer I just bought. :(
Score: 1 Votes (Like | Disagree)
93 months ago
Me too - same issue. I'm using a mid-2015 MacBook Pro with latest release of Mojave.
This fix worked for me. https://www.reddit.com/r/MacOSBeta/comments/clb8at/the_requested_version_of_macos_is_not_available/
Score: 1 Votes (Like | Disagree)
otter247 Avatar
94 months ago
I have tried enrolling and unenrolling several times. Still the software update dialog says, "requested update not found". I have also tried rebooting the machine but still no luck. Any advice? I'm running macOS Mojave 10.14.6
I have the exact issue and am also on latest Mojave 10.14.6. Please repost if you find a solution. Thanks.
Score: 1 Votes (Like | Disagree)

Popular Stories

Home Hub Command Center with Dome Base Feature

Apple Smart Home Hub to Feature iMac G4-Style Design

Wednesday September 30, 2026 4:36 am PDT by
Apple's long-rumored smart home hub will have an iMac G4-style design and a host of unique features, Bloomberg's Mark Gurman reports. The smart home hub is said to feature a square 6-inch display, with variants that can be placed on a countertop or mounted on a wall. It features a single FaceTime camera on the front, with microphones and speakers in its connected base. Gurman described the...
HomePod minis on gradient feature 1 1

Three New Apple Smart Home Products Coming on October 13

Wednesday September 30, 2026 4:04 am PDT by
Apple plans to introduce a series of new smart home products on Tuesday, October 13, according to Bloomberg's Mark Gurman. Apple reportedly plans to debut its long-awaited smart home hub device, a new HomePod mini, and a new Apple TV on the date. The new HomePod mini and Apple TV are set to retain their existing designs, but tout faster chips to support Siri AI. The new HomePod mini will...
Apple TV Sans Remote Feature

New Apple TV 4K Leaked

Friday September 25, 2026 8:16 am PDT by
MacRumors contributor Aaron Perris has uncovered an image file from Apple for an unreleased Apple TV 4K, suggesting that a new model will finally be released soon. The image is specifically for an "Apple TV 4K (4th generation)" model. Apple TV 4K (4th generation) image (on a gradient) The image reveals that the Apple TV will have the same external design as the current model, with all of its...
Latest Stories
New 'AirFly Drive' Accessory Turns Wired CarPlay Into Wireless CarPlay
New 'AirFly Drive' Accessory Turns Wired CarPlay Into Wireless CarPlay
2 minutes ago
Apple Shares Photos Shot on iPhone Duo
Apple Shares Photos Shot on iPhone Duo
2 hours ago
Apple Says iPhone Duo Has Replaceable 'Cover Layer' Above the Display
Apple Says iPhone Duo Has Replaceable 'Cover Layer' Above the Display
3 hours ago
Apple's Smart Home Camera Will Apparently Have 'No Video Recording'
Apple's Smart Home Camera Will Apparently Have 'No Video Recording'
4 hours ago
Apple TV Just Updated Its Selection of 'Bonus' Movies
Apple TV Just Updated Its Selection of 'Bonus' Movies
6 hours ago
iPhone 18 Pro Colors Buyer's Guide: Which Should You Choose?
iPhone 18 Pro Colors Buyer's Guide: Which Should You Choose?
6 hours ago
Early Prime Big Deal Days: Best Discounts on Accessories, TVs, and More at Amazon
Early Prime Big Deal Days: Best Discounts on Accessories, TVs, and More at Amazon
7 hours ago
MacBook Pro With OLED Touch Screen Rumored to Launch in October or November
MacBook Pro With OLED Touch Screen Rumored to Launch in October or November
8 hours ago
Apple's All-New Home Hub Rumored to Launch in These Four Colors
Apple's All-New Home Hub Rumored to Launch in These Four Colors
8 hours ago
iPhone 18 Pro Aperture Control Goes Fully Manual in Halide 3.2
iPhone 18 Pro Aperture Control Goes Fully Manual in Halide 3.2
10 hours ago
Apple Stores Receive 'Do Not Open' Boxes Ahead of Smart Home Products Launch
Apple Stores Receive 'Do Not Open' Boxes Ahead of Smart Home Products Launch
10 hours ago
iPhone 18 Pro Sales Jump in China Ahead of iPhone Duo Launch
iPhone 18 Pro Sales Jump in China Ahead of iPhone Duo Launch
11 hours ago
Apple TV Still Down for Some Users Following Apple Services Outage
Apple TV Still Down for Some Users Following Apple Services Outage
11 hours ago
PSA: Apple Mail on Mac May Stop Syncing Microsoft 365 Accounts Today
PSA: Apple Mail on Mac May Stop Syncing Microsoft 365 Accounts Today
12 hours ago
Apple's Smart Home Hub: Everything We Know So Far
Apple's Smart Home Hub: Everything We Know So Far
22 hours ago
Apple's Home Hub Borrows From the iPhone Duo's StandBy Mode
Apple's Home Hub Borrows From the iPhone Duo's StandBy Mode
23 hours ago
Apple Invites App Updated With Three New Features
Apple Invites App Updated With Three New Features
1 day ago
Apple Event on October 13?
Apple Event on October 13?
1 day ago
Apple Watch SE 3 vs. Series 12 Buyer's Guide: Which Should You Buy?
Apple Watch SE 3 vs. Series 12 Buyer's Guide: Which Should You Buy?
1 day ago
iPad Mini 8 to Offer These 10 New Features
iPad Mini 8 to Offer These 10 New Features
1 day ago
DoorDash Unveils AI Food Ordering Through Apple's Messages App
DoorDash Unveils AI Food Ordering Through Apple's Messages App
1 day ago
Amazon Takes Up to $150 Off Select M5 MacBook Air Models
Amazon Takes Up to $150 Off Select M5 MacBook Air Models
1 day ago
Apple Still Plans to Release a New Full-Sized HomePod
Apple Still Plans to Release a New Full-Sized HomePod
1 day ago
Apple Working to Expand HomeKit
Apple Working to Expand HomeKit
1 day ago
Apple Smart Home Hub to Feature iMac G4-Style Design
Apple Smart Home Hub to Feature iMac G4-Style Design
1 day ago
Three New Apple Smart Home Products Coming on October 13
Three New Apple Smart Home Products Coming on October 13
1 day ago
Apple Pay Now Available in India With Axis Bank Cards
Apple Pay Now Available in India With Axis Bank Cards
2 days ago
OpenAI Launches Always-On 'Dots' Agents to Rival Meta's Muse
OpenAI Launches Always-On 'Dots' Agents to Rival Meta's Muse
2 days ago
AirPods 5 Teardown: Batteries Removable, Case Still Tough
AirPods 5 Teardown: Batteries Removable, Case Still Tough
2 days ago
iPhone 18 Pro Owners Complain of Speaker Crackling or Popping
iPhone 18 Pro Owners Complain of Speaker Crackling or Popping
2 days ago

🔗 Related Apple News & Rumors

Stay updated with the latest Apple ecosystem news and verified rumors