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Apple Seeds Release Candidate Version macOS Monterey 12.3 Beta to Developers and Public Beta Testers

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Apple today seeded the release candidate version of an upcoming macOS Monterey 12.3 update to developers for testing purposes, with the new software coming a week after the release of the fifth macOS Monterey 12.3 beta. The RC represents the final version of macOS Monterey 12.3 that will be released publicly next week.

macOS-Monterey-on-MBP-Feature.jpg

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.

Update: The update is now also available to public beta testers.

Article Link: Apple Seeds Release Candidate Version macOS Monterey 12.3 Beta to Developers and Public Beta Testers
 
Article Link
https://www.macrumors.com/2022/03/08/apple-seeds-macos-monterey-12-3-rc/
Last edited:
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I'm not even exited for Universal Control, I'm just glad that 12.3 fixes the artifacts on the sides of transparent windows such as control centre when running it on a Mac with certain Intel HD graphics chips...
 
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RC
Safari Version 15.4 (17613.1.17.1.6) No change

System Firmware Version: 7459.101.2 (M1 based Macs) No change

Darwin Kernel Version 21.4.0: Mon Feb 21 20:36:53 PST 2022; root:xnu-8020.101.4~2/RELEASE_ARM64_T8101 arm64

beta 5
Safari Version 15.4 (17613.1.17.1.6)

System Firmware Version: 7459.101.2 (M1 based Macs)

Darwin Kernel Version 21.4.0: Mon Feb 21 21:57:28 PST 2022; root:xnu-8020.101.4~4/RELEASE_ARM64_T8101 arm64
 
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For macOS 12.3 RC (21E230) - March 8, 2022

Apple Pay​

New Features​

  • Developers can express payment network preference in PKPaymentRequest. Network preference is determined by the order of supportedNetworks. This won’t override the user’s default card selection, but if the card is multi-SSD, then the network preference order determines which SSD is selected. (80827905)

Authentication​

New Features​

  • Support is added to the passkey technology preview, enabling signing in to passkey-compatible websites and apps on Mac and iPad using an iPhone with a saved passkey. (87998252)

Game Controller​

New Features​

  • Support is now available for new DualSense adaptive trigger firmware features available via GCDualSenseAdaptiveTrigger. (87433163)

iWork​

Known Issues​

  • Collaboration scenarios might not work when the user configures the system to a right-to-left language. (89078453)
    Workaround: Use iWork.com to collaborate in Safari using a right-to-left language.

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)

libc++​

New Features​

  • The following new C++20 and C++23 features are now implemented:
    • C++20 library concepts defined in <concepts>.
    • constexpr for std::swap() and swap-related functions.
    • Miscellaneous constexpr-ification in the library.
    • std::atomic now default initializes as expected.
    • A .contains() method for associative containers.
    • Added std::bind_front(). (88131816)

Deprecations​

  • Some extensions in std::tuple were removed to fix bugs caused by those extensions:
    • Tuples can no longer be constructed from fewer than the number of elements in the tuple. Previously, elements that weren’t specified were default-constructed; now this is a compiler error.
    • A tuple can no longer be constructed from an array.
    • The std::result_of and std::is_literal_type type traits are no longer available in C++20 mode, as specified in the Standard.

Python​

Deprecations​

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

StoreKit​

New Features​

Universal Control​

Known Issues​

  • 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​

Deprecations​

  • Support for inline viewing of PostScript files is no longer available. (88172449)
 
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I am so pretty sure the final version build number will be different. Instead of 21E230 it will be like 21E231
Otherwise, I would go through the trouble to install the beta profile, update to RC and remove the profile :)
 
Had to attempt update a couple of times, it seems to have updated finally but with a free kernel panic (SEP ROM boot panic [Scrubbed].). Hopefully no further issues.
 
fhall1 said:
Wow - only 8 comments after almost 24 hours?!? I figured there would be lots of reporting on bugs finally fixed/still not fixed, etc.
Click to expand...
I was also surprised last night, but this thread was quickly buried under a few dozen Event threads. I'm almost more surprised a few of us are posting on it today as it's way down on the second page of MacRumors.
 
elementalwingma said:
I thought I was going crazy and it was still only me.
Click to expand...
It's definitely related to APFS - I have one HPFS+ volume that mounts instantly. Something major changed in how they handle the file system. It wouldn't be bad if it would mount them all at the same time, but it's sequential, so is a major PITA. Like booting circa 2002.
 
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