Apple Seeds Third macOS Monterey 12.3 Beta to Developers - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

Apple Seeds Third macOS Monterey 12.3 Beta to Developers

Apple today seeded the third 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 second 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. There is also a macOS 11.6.5 update for those still running macOS Big Sur.

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.

maOS 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

apple pro tell logo

Apple Launching Five New Products Today

Thursday November 5, 2026 12:59 am PST by
Apple is launching five new products on Friday, November 6, following pre-orders that opened last week, including its first touchscreen MacBook Pro models. The following new products will be available from today: iPad mini with OLED display and A20 Pro chip iMac with M6 chip 14-inch MacBook Pro with M6 chip 14-inch MacBook Pro with OLED touchscreen 16-inch MacBook Pro with OLED...
duo aquarium

More Fun iPhone Duo Apps: 30 New Picks to Try

Friday November 6, 2026 3:27 pm PST by
When the iPhone Duo launched, we shared a list of some of the fun apps developers created for the new form factor. Two weeks out, developers are continuing to come up with fresh ideas, so we thought we'd share some of our favorites. Games Marbles Unhinged ($2.99) - Marbles Unhinged is a marble maze designed for the Duo. When you fold it, the floor turns into a ramp. If you stand the top...
silver iphone 18 pro

Apple Rumored to Drop the iPhone's Action Button Next Year

Friday November 6, 2026 6:07 am PST by
Apple plans to merge the iPhone's Action button with the Camera Control starting next year, according to the leaker known as "Instant Digital." In a new post on Weibo, the leaker claimed that a single press of the combined button would open the camera, while a long press would trigger the function assigned to the Action button. They explicitly clarified that the dedicated Action button would ...

Top Rated Comments

Realityck Avatar
62 months ago

Really hope this is the release with major issues addressed and feature complete. I’d like to upgrade, just for universal control and the latest privacy and security features, but Apple’s poor software quality demands precaution before upgrading.
So your not really participating in beta testing, right? Just making comments.
Score: 21 Votes (Like | Disagree)
BWhaler Avatar
62 months ago
Really hope this is the release with major issues addressed and feature complete. I’d like to upgrade, just for universal control and the latest privacy and security features, but Apple’s poor software quality demands precaution before upgrading.
Score: 8 Votes (Like | Disagree)
Realityck Avatar
62 months ago
[SPOILER="macOS Monterey 12.3 Beta 3 Release Notes"]
FaceTime
Known Issues

* 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)

Kernel
Deprecations

* 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)

LibreSSL
Known Issues

* 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)
Workaround: The openssl enc command should be run by adding the -md md5argument.

Mobile Software Update
Resolved in macOS Monterey 12.3 Beta 3

* Fixed: Installing to an empty volume from macOS Recovery might fail. (87730473)

Python
Deprecations

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

Safari
Known Issues

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

ScreenCaptureKit
Known Issues

* 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)

Universal Control
Known Issues

* 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)

WebKit
Known Issues

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

Deprecations

* Support for inline viewing of PostScript files was removed. (88172449


[/SPOILER]
Score: 7 Votes (Like | Disagree)
Realityck Avatar
62 months ago

Are you complaining, I can't tell. It makes sense to have administrator status for performing an administrator function. I like a bad guy have administrator status in my main login, and got no login prompt before downloading. I did need to type a password before install, but that seems fair. I know, I know, I should have separate logins, don't remind me
Its a legit observation.

For many 12.0, 12.0.1, 12.1, 12.2 Monterey betas in the past it was at the end of the install. Download, preparation, prompted Admin credential then it installs.

12.3 Beta 2 and this Beta 3 have the Admin credential event now occurring before the whole installation process. Its functional better because you don't have to wait until the end of preparation to return to do that.
Score: 6 Votes (Like | Disagree)
62 months ago
Improve safari already! It's not like you don't have the money, Apple. Make it the best browser for the Mac, not just a nice to look at browser that misbehaves all the time
Score: 5 Votes (Like | Disagree)
Realityck Avatar
62 months ago
Good deal want to see how the third beta does against some issues.

macOS 12.3 beta 3 (21E5212f). Once again it starts by asking for admin password before downloading. M1 download is 2.92 GB.
Score: 5 Votes (Like | Disagree)
Latest Stories
Siri AI Rumored to Become 'More Like an Agent' as Early as Next Year
Siri AI Rumored to Become 'More Like an Agent' as Early as Next Year
40 minutes ago
Apple Taking New Approach to Developing iOS 28 and macOS 28
Apple Taking New Approach to Developing iOS 28 and macOS 28
2 hours ago
Early Apple Black Friday Deals on Apple Watch, MacBook Air, and More
Early Apple Black Friday Deals on Apple Watch, MacBook Air, and More
21 hours ago
'Backglow' Lets You Customize New MacBook Pro's Glowing Apple Logo
'Backglow' Lets You Customize New MacBook Pro's Glowing Apple Logo
21 hours ago
Top Stories: Apple Product Launches, iOS 27.3 Beta, and More
Top Stories: Apple Product Launches, iOS 27.3 Beta, and More
1 day ago
More Fun iPhone Duo Apps: 30 New Picks to Try
More Fun iPhone Duo Apps: 30 New Picks to Try
2 days ago
Hands-On With Apple's New OLED Touchscreen MacBook Pro
Hands-On With Apple's New OLED Touchscreen MacBook Pro
2 days ago
Apple Store With All-New Design Opening Soon in Southern California
Apple Store With All-New Design Opening Soon in Southern California
2 days ago
Control the Glowing Apple Logo on Your New MacBook Pro
Control the Glowing Apple Logo on Your New MacBook Pro
2 days ago
Apple Shares New 'Apple Card: Apply and Use in Minutes' Ad
Apple Shares New 'Apple Card: Apply and Use in Minutes' Ad
2 days ago
Apple Says More Than 100,000 Apps Optimized for iPhone Duo, Here's What's Still Missing
Apple Says More Than 100,000 Apps Optimized for iPhone Duo, Here's What's Still Missing
2 days ago
Early Black Friday Deals Kickoff With Steep Discounts on Apple Watch Ultras and More
Early Black Friday Deals Kickoff With Steep Discounts on Apple Watch Ultras and More
2 days ago
The MacRumors Show: iOS 27.3 Looks Like a Huge Update
The MacRumors Show: iOS 27.3 Looks Like a Huge Update
2 days ago
Best Buy's Black Friday Event Begins With Sitewide Savings on Apple, TVs, More
Best Buy's Black Friday Event Begins With Sitewide Savings on Apple, TVs, More
2 days ago
Apple Releasing Yet Another Two New Products Next Week
Apple Releasing Yet Another Two New Products Next Week
2 days ago
MacBook Air Drops to Lowest Price in Months With Amazon's $250 Discount
MacBook Air Drops to Lowest Price in Months With Amazon's $250 Discount
2 days ago
Apple Rumored to Drop the iPhone's Action Button Next Year
Apple Rumored to Drop the iPhone's Action Button Next Year
2 days ago
Apple's Extended Return Policy Now in Effect for 2026 Holiday Season
Apple's Extended Return Policy Now in Effect for 2026 Holiday Season
2 days ago
Apple Music Classical Updated With New Icon and Refreshed Design
Apple Music Classical Updated With New Icon and Refreshed Design
2 days ago
OLED iPad Mini, M6 iMac, and New MacBook Pros Available From Today
OLED iPad Mini, M6 iMac, and New MacBook Pros Available From Today
2 days ago
Apple Surveys iPhone Duo Buyers About Crease and Camera
Apple Surveys iPhone Duo Buyers About Crease and Camera
3 days ago
Apple's First Touchscreen Mac is Now Arriving to Customers
Apple's First Touchscreen Mac is Now Arriving to Customers
3 days ago
Claude Gets Personal Finance Feature With Bank Account Linking
Claude Gets Personal Finance Feature With Bank Account Linking
3 days ago
Apple Arcade Adds Crossy Road Rush and NBA 2K27
Apple Arcade Adds Crossy Road Rush and NBA 2K27
3 days ago
Apple's New HomeView Smart Home Hub: Here's How Much RAM It Has
Apple's New HomeView Smart Home Hub: Here's How Much RAM It Has
3 days ago
iPad Mini vs. iPad Air Buyer's Guide: Now Just $50 Apart
iPad Mini vs. iPad Air Buyer's Guide: Now Just $50 Apart
3 days ago
First iOS 27.3 and macOS Golden Gate 27.3 Public Betas Now Available
First iOS 27.3 and macOS Golden Gate 27.3 Public Betas Now Available
3 days ago
Apple Announces a New Mac Sales Record
Apple Announces a New Mac Sales Record
3 days ago
Paid $200 for Logic Pro? Apple Says You Won't Get This New Feature
Paid $200 for Logic Pro? Apple Says You Won't Get This New Feature
3 days ago
Instagram's Edits Video Editor is Now Available on Mac
Instagram's Edits Video Editor is Now Available on Mac
3 days ago