Apple Seeds Fourth macOS Monterey 12.3 Beta to Developers [Update: Public Beta Available]

by

Apple today seeded the fourth beta of an upcoming macOS macOS Monterey 12.3 update to developers for testing purposes, with the new software coming a week after the release of the third macOS Monterey 12.3 beta.

macOS Monterey on MBP Feature
Registered developers can download the beta through the Apple Developer Center and after the appropriate profile is installed, betas will be available through the Software Update mechanism in System Preferences.

macOS Monterey 12.3 is a major update that introduces Universal Control, a feature that Apple first teased at WWDC and then delayed for several months. ‌Universal Control‌ is designed to allow you to use a single mouse/trackpad and keyboard across multiple Macs and iPads (with iPads running iPadOS 15.4).

After updating your devices to macOS 12.3 and iPadOS 15.4, ‌Universal Control‌ works automatically, allowing your Mac's cursor and keyboard to work on the iPad and vice versa. It's simple and intuitive to use.

macOS Monterey 12.3 adds support for updating the AirPods firmware when the earbuds are connected to a Mac, plus it deprecates kernel extensions used by Dropbox and Microsoft OneDrive, and it eliminates Python 2, with Apple instructing developers to use an alternative scripting language like Python 3 going forward.

There are also new emoji characters, including melting face, biting lip, heart hands, bubbles, beans, face with diagonal mouth, palm up hand, eggs, troll, low battery, coral, lotus, and more.

Related Forum: macOS Monterey

Popular Stories

iPhone 17 Pro 34ths Perspective

iPhone 17 Pro Launching Later This Year With These 10 New Features

Sunday March 23, 2025 10:00 am PDT by
While the iPhone 17 Pro and iPhone 17 Pro Max are not expected to launch until September, there are already plenty of rumors about the devices. Below, we recap key changes rumored for the iPhone 17 Pro models as of March 2025: Aluminum frame: iPhone 17 Pro models are rumored to have an aluminum frame, whereas the iPhone 15 Pro and iPhone 16 Pro models have a titanium frame, and the iPhone ...
Read Full Article • 242 comments
iOS 18

iOS 18.4 Expected Next Week - Here Are the Release Notes

Friday March 28, 2025 2:01 pm PDT by
With the second release candidate of iOS 18.4 that Apple seeded out today, the company finally provided us with release notes that give a full rundown on what to expect. There's an Apple Vision Pro app, new Apple Intelligence features for notifications and additional language support, plus an Apple News Food feature for Apple News+ subscribers, and several updates that should improve the...
Read Full Article • 51 comments
Magic Mouse Green

What to Expect From the Magic Mouse 3

Saturday March 29, 2025 10:15 am PDT by
Apple is reportedly working on a new Magic Mouse. Below, we recap what to expect. The two key rumors for the Magic Mouse 3 so far include a relocated charging port, along with a more ergonomic design. It was briefly rumored that the Magic Mouse 3 would also feature voice control, but that was misinterpreted information. Relocated Charging Port While the Magic Mouse switched from...
Read Full Article • 291 comments
top stories 2025 03 29

Top Stories: WWDC 2025 Announced, iPhone 17 Pro and iOS 19 Rumors, and More

Saturday March 29, 2025 6:00 am PDT by
Apple's big developer event is a little over two months away, and rumors about what we can expect to see in Apple's next major operating system updates are becoming increasingly frequent. A public release of iOS 18.4 is also imminent with a number of updates and improvements, although we won't be getting the major Apple Intelligence Siri upgrades that had reportedly been planned for this...
Read Full Article • 6 comments
Foldable iPhone 2023 Feature Homescreen

Six Things to Know About Apple's Upcoming Foldable iPhone

Friday March 28, 2025 3:54 pm PDT by
We've been hearing rumors about a foldable iPhone for almost a decade now, but it looks like we might finally see the device come to fruition in 2026. We're going to be waiting many more months for the foldable iPhone, but so far we're hearing good things. Apple wants to make it creaseless. It's taken Apple multiple years to design a foldable iPhone that it's satisfied with because Apple ...
Read Full Article • 203 comments
iOS 19 visionOS UI Elements

Apple Codename Provides Clue About iOS 19's Rumored New Design

Sunday March 30, 2025 6:40 am PDT by
Multiple sources have claimed that iOS 19 will introduce a new design with more translucent buttons, menus, notification banners, and more, and there is now another clue that points towards this glass-like appearance. Bloomberg's Mark Gurman today said the new design project is codenamed "Solarium" internally. A solarium is a room with glass walls that allow in plenty of sunlight, so this...
Read Full Article • 117 comments
maxresdefault

Apple Releases iOS 18.4 With Priority Notifications, Ambient Music, New Emoji and More

Monday March 31, 2025 10:03 am PDT by
Apple today released iOS 18.4 and iPadOS 18.4, the fourth major updates to the iOS 18 and iPadOS 18 operating system updates that came out last year. iOS 18.4 and iPadOS 18.4 come two months after Apple released iOS 18.3 and iPadOS 18.3. Subscribe to the MacRumors YouTube channel for more videos. The new software can be downloaded on eligible iPhones and iPads over-the-air by going to...
Read Full Article • 62 comments
ipad pro 2024

Gurman: New iPad Pro and MacBook Pro Models With M5 Chips to Launch Later This Year

Sunday March 30, 2025 6:06 am PDT by
Apple's next-generation iPad Pro models with the M5 chip will "launch this year," according to Bloomberg's Mark Gurman. In his Power On newsletter today, Gurman said the new iPad Pro models have progressed to an "advanced testing" stage, and he expects mass production of the devices to begin in the second half of this year. If that timeframe is met, the new iPad Pro models could launch...
Read Full Article • 145 comments
Facebook Feature

Facebook's New iPhone App Feature Turns the Clock Back to 2007

Thursday March 27, 2025 1:59 pm PDT by
In the mid-to-late 2000s, Facebook was all about staying connected with friends and family. However, as the social media platform added new features and grew over time, that core experience began to get drowned out. That changes starting now, according to Meta, which today introduced a new feature that will "bring back the joy" of classic Facebook. Specifically, Meta has redesigned the...
Read Full Article • 116 comments

Top Rated Comments

Realityck Avatar
Realityck
41 months ago
Hope this addresses some of the outstanding issues.
macOS 12.3 beta 4 (21E5222a)

[SPOILER="macOS Monterey 12.3 Beta 4 Release Notes"]
[HEADING=2]FaceTime[/HEADING]
[HEADING=3]Resolved in macOS Monterey 12.3 Beta 4[/HEADING]

* Fixed: On iOS and macOS, it’s possible to trigger taking a photo of a participant when in a Group FaceTime call. On iOS, this could occur when you tap the Grid button or the bottom-left corner of the screen. On macOS, this could occur when you click the Grid button or the top-right corner of the window. (88720303)

[HEADING=2]Kernel[/HEADING]
[HEADING=3]Deprecations[/HEADING]

* The kernel extensions used by Dropbox Desktop Application and Microsoft OneDrive are no longer available. Both service providers have replacements for this functionality; Dropbox is currently in beta. (85890896)

[HEADING=2]LibreSSL[/HEADING]
[HEADING=3]Resolved in macOS Monterey 12.3 Beta 4[/HEADING]

* Fixed: LibreSSL 3.3 has changed the default digest type of openssl enc Terminal command to SHA256. Files previously encrypted with an older version of OpenSSL might fail to decrypt. (87763613)

[HEADING=2]Python[/HEADING]
[HEADING=3]Deprecations[/HEADING]

* Python 2.7 was removed from macOS in this update. Developers should use Python 3 or an alternative language instead. (39795874)

[HEADING=2]Safari[/HEADING]
[HEADING=3]Resolved in macOS Monterey 12.3 Beta 4[/HEADING]

* Fixed: Safari might crash upon loading webpages on a Mac with Apple silicon. (88222677)

[HEADING=2]ScreenCaptureKit[/HEADING]
[HEADING=3]Resolved in macOS Monterey 12.3 Beta 4[/HEADING]

* Fixed: In ScreenCaptureKit ('https://developer.apple.com/documentation/screencapturekit'), if an origin other than (0,0) is specified in the destinationRect ('https://developer.apple.com/documentation/screencapturekit/scstreamconfiguration/3919822-destinationrect') or sourceRect ('https://developer.apple.com/documentation/screencapturekit/scstreamconfiguration/3919829-sourcerect'), the contentRect is incorrect. (87363220)

[HEADING=2]Universal Control[/HEADING]
[HEADING=3]Known Issues[/HEADING]

* Unexpected disconnections might occur on initial connection. (88106231)
Workaround: Sleep, then wake the device, and try again.
* Drag-and-drop scenarios might not work for some file types and apps. (88106322)
* Some third-party keyboards and mice might encounter issues when using additional functionality, like scroll wheels. (88106362)

[HEADING=2]WebKit[/HEADING]
[HEADING=3]Resolved in macOS Monterey 12.3 Beta 4[/HEADING]

* Fixed: Using the App Store might lead to an authentication loop in which the HTML sheet has no content. (87850345)

[HEADING=3]Deprecations[/HEADING]

* Support for inline viewing of PostScript files is no longer available. (88172449)


[/SPOILER]

This one is important if it actually has been addressed.

* Fixed: Safari might crash upon loading webpages on a Mac with Apple silicon. (88222677)
Score: 8 Votes (Like | Disagree)
johnalan Avatar
johnalan
41 months ago
I've been using macOS/X since Panther.
It's always felt ultra compressed - perfect in form.

I've been aware of sloppy stuff since Catalina.

For example, you can see your trusted devices on iCloud.com and it lists all devices and their Apple Pay cards. On id.apple.com, the cards are missing from the Macs, not from the iDevices. On System Preferences, the same.


It's getting messy, even look at this stylistic disparity in the same config Window in macOS:







* Want / Wish
* a 30 day period / 30 days to




This might seem minor, and it is, but this is the type of slop that's been slowly creeping in.

Attachment Image

Attachment Image
Score: 6 Votes (Like | Disagree)
Jimmy_Banks Avatar
Jimmy_Banks
41 months ago
Memory leak fixes please.
Score: 5 Votes (Like | Disagree)
DHagan4755 Avatar
DHagan4755
41 months ago

Hope this addresses some of the outstanding issues.
Yeah like the Apple Music app sucking ('https://forums.macrumors.com/threads/can-we-talk-about-how-apple-music-is-a-mess-on-monterey.2335508/').
Score: 3 Votes (Like | Disagree)
MallardDuck Avatar
MallardDuck
41 months ago
Maybe this one will finally fix the USB bugs
Score: 3 Votes (Like | Disagree)
Realityck Avatar
Realityck
41 months ago
Beta 4
Safari Version 15.4 (17613.1.17.1.5)

System Firmware Version: 7459.101.2 (M1 based Macs)

Darwin Kernel Version 21.4.0: Mon Feb 14 22:26:41 PST 2022; root:xnu-8020.101.3~4/RELEASE_ARM64_T8101 arm64

Beta 3
Safari is Version 15.4 (17613.1.16.1.6)

System Firmware Version: 7459.100.504.0.1 (M1 based Macs)

Darwin Kernel Version 21.4.0: Mon Feb 7 21:32:19 PST 2022; root:xnu-8020.100.429.131.1~2/RELEASE_ARM64_T8101 arm64
Score: 3 Votes (Like | Disagree)
Read All Comments