Big Sur 11.0.1 Release Candidate 2 (20B28) What’s New?

macOS Big Sur Beta 11.0.1 Release Candidate 2 (20B28) Beta 3 is Live!

UPDDATE 11/10/20 10:30PM

• Apple has released a full installer for 11.0.1 RC2
• Public Beta Released!
• No listed changes from RC1 > RC2
• New Platform ID’s found! MacBook Air = MacBookAir10,1 MacBook Pro = MacBookPro17,1 Mac mini = Macmini9,1 – HT Martin Nobel for finding these!
• Getting reports of BridgeOS Update errors when trying to upgrade a T2 Mac that has never had Big Sur on it before.

MacOS Big Sur 11.0.1 RC 2 (Beta 3) was released on November 10th, 2020 after the Apple Silicon “One more thing” event. The release comes about one week after 11.0.1 RC Beta 2. We were expecting that Big Sur might launch today or tomorrow but now it’s been confirmed…

macOS Big Sur will be released to the public on November 12, 2020!

If you are having issues getting Beta 2 11.0.1 to show up in Software Update, take a look at my Big Sur Beta troubleshooting article. – mrmacintosh.com/big-sur-11-beta-not-showing-up-in-software-update-troubleshooting/

NEW! My Mac Transition to Apple Silicon “Everything you need to know” Article – mrmacintosh.com/mac-transition-to-apple-silicon-everything-you-need-to-know-updated/

Keep an eye on my Big Sur Need to Know changes article. I will be constantly updating it as new info comes in. mrmacintosh.com/macos-big-sur-11-0-updated-index-of-need-to-know-changes-links/

macOS Big Sur 11.0.1 RC 2 – Beta 3 Release Candidate Patch Notes Summary

• Apple has not noted any changes from RC1 > RC2
• Apple Seed Notes = No Changes

AppleSeed Notes Link = appleseed.apple.com/

Developer Public Link = developer.apple.com/documentation/macos-release-notes

Apple DTK Mac Mini Notes = developer.apple.com/documentation/macos-release-notes/macos-big-sur-11-universal-apps-beta-release-notes

MacAdmin Patch Notes of Interest

• AppleSeed = 1 note – appleseed.apple.com
• Updating to macOS Big Sur 11.0.1 Release Candidate from previous versions of macOS might take significantly longer than expected. Data loss could occur if the update is interrupted. (59101197)

Previous Big Sur 11 Beta Releases

• 13. Big Sur 11 Beta 11.0.1 (20B28) Beta 3 RC 2 – 11/10/20 Current Release
• 12. Big Sur 11 Beta 11.0.1 (20B5022a) Beta 2 RC – 11/05/20 My Release Notes
• 11. Big Sur 11 Beta 11.0.1 (20B5012d) Beta 1 – 10/28/20 – My Release Notes
• 10. Big Sur 11 Beta 10 (20A5395g) – 10/14/20 – My Release Notes
• 9. Big Sur 11 Beta 9 (20A5384c) – 09/29/20 – My Release Notes
• 8. Big Sur 11 Beta 8 (20A5374i) – 09/22/20 – My Release Notes
• 7. Big Sur 11 Beta 7 (20A5374g) – 09/17/20 – My Release Notes
• 6. Big Sur 11 Beta 6 (20A5364e) – 09/03/20 – My Release Notes
• 5. Big Sur 11 Beta 5 (20A5354i) – 08/19/20 – My Release Notes
• 4. Big Sur 11 Beta 4 (20A5343i) – 08/04/20 
• 3. Big Sur 11 Beta 3 (20A5323l) – 07/22/20
• 2. Big Sur 11 Beta 2 (20A4300b) – 07/07/20 – My Release Notes
• 1. Big Sur 11 Beta 1 (20A4299v) – 06/22/20 – My Release Notes

macOS Big Sur 11 Installer Info

Note: Combo and Delta updates are not available as standalone downloads.

Full Installer.app

A Full Installer of MacOS Big Sur 11.0.1 Beta 3 RC 2 is AVAILABLE!!

Mac App Store

https://apps.apple.com/us/app/macos-big-sur-beta/id1497794093

Link – developer.apple.com or installinstallmacos.py

Size = 12.2GB

Big Sur Beta Delta Update

This is the update is for updating from 11.0.1 Beta 2 RC > 11.0.1 RC 2

Size = 3.22GB

Big Sur Beta Combo Update

This is update should be for updating from Beta 1 – 11.0.1 > 11.0.1 RC 2

Size = 4.50GB

T2 BridgeOS Update

The Version of BridgeOS for your T2 Security Chip was updated.

BridgeOS version = 18.16.12561.0.0

Size = 444.3MB 

Product ID = 001-77427

• 8. Previous Beta 11.0.1 RC = 18.16.12560.5.1
• 7. Previous Beta 11 = 18.15.12551
• 6. Previous Beta 10 = 18.16.12402.5.2
• 5. Previous Beta 9 = 18.16.12390.5.1
• 4. Previous Beta 8 = 18.16.12380 BuildVersion 3
• 3.Previous Beta 7 = 18.16.12380
• 2. Previous Beta 6 = 18.16.12370.5.1
• 1. Previous Beta 5 = 18.16.10358.5.2

New Software Update Catalog URL

Beta

https://swscan.apple.com/content/catalogs/others/index-10.16seed-10.16-10.15-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog

Production

https://swscan.apple.com/content/catalogs/others/index-11-10.15-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog

macOS Big Sur 11.0.1 RC 2 – Beta 3 Release Candidate (20B28) Release Notes

General

Known Issues

Important

Updating to macOS Big Sur 11.0.1 Release Candidate 2 from previous versions of macOS might take significantly longer than expected. Data loss could occur if the update is interrupted. (59101197)

Accessibility

Known Issues

• You might be unable to pair certain braille displays using Bluetooth. (69794099)Workaround: Connect these devices using USB instead.

AppKit

• See AppKit Release Notes for macOS Big Sur 11.

Installer and Software Update

Known Issues

• When updating from macOS Big Sur 11 beta 2 to macOS Big Sur 11 beta 3 or later, you might be offered an unexpectedly large download rather than an incremental software update. (65753086)Workaround: Under the “Another update is available” text, click the “More info…” link. This reveals the incremental update where you can click the Install Now button.
• You might need to adjust Energy Saver settings so your Mac doesn’t go to sleep while preparing to install macOS Big Sur 11.0.1 Release Candidate 2. (63166401)
• If macOS Big Sur 11.0.1 Release Candidate 2 is installed into the same APFS container as previous versions of macOS Catalina 10.15, system software updates can no longer be installed on the previous versions of macOS. (64411484)Workaround: Update the previous version of macOS Catalina to 10.15.6 or later.

Kernel

Known Issues

• Installing a new kernel extension requires signing in as an Admin user. You must also restart your Mac to load the extension. Kernel extensions using certain deprecated KPIs won’t be loaded. For more information, see Deprecated Kernel Extensions and System Extension Alternatives. (55068348)Workaround: During development, you can temporarily disable System Integrity Protection to allow these deprecated kernel extensions to load.
• New in macOS Big Sur 11.0.1 Release Candidate 2, the system ships with a built-in dynamic linker cache of all system-provided libraries. As part of this change, copies of dynamic libraries are no longer present on the filesystem. Code that attempts to check for dynamic library presence by looking for a file at a path or enumerating a directory will fail. Instead, check for library presence by attempting to dlopen() the path, which will correctly check for the library in the cache. (62986286)
• Use only absolute paths with the --volume-root option of kmutil, and don’t use a trailing /. (63773848)
• Symbols exported by both xnu and Apple kernel extensions will change. Recompile your kernel extension with each update to macOS Big Sur 11.0.1 Release Candidate 2 to ensure compatibility. (64262563)

SwiftUI

Known Issues

• ProgressView generic type signature has changed, adding the currentValueLabel generic parameter. This change doesn’t require any source changes, but it causes apps compiled using an earlier beta SDK to quit unexpectedly. (63580200)Workaround: Re-compile apps for macOS Big Sur 11 Beta 6 or later to resolve this issue.

Third-Party Apps

Known Issues

• You might experience kernel panics when using earlier versions of Parallels Desktop 16. (67358596)Workaround: Upgrade to the most-recent version of Parallels Desktop 16.
• Some third-party scripts might produce unexpected results due to the change in macOS version from 10.x to 11. (62477208)Workaround: Set SYSTEM_VERSION_COMPAT=1 in the calling environment, for example: $ SYSTEM_VERSION_COMPAT=1 legacy_script.pl

Wallet

Known Issues

• isPassLibraryAvailable() doesn’t ensure uniform availability of pass library functionality between platforms and devices. (60697880)Workaround: Call a more specific API to check available functionality, such as canAddPasses().

Xcode

Known Issues

• Legacy Xcode versions prior to 11.5 might unexpectedly quit when launched. (59991056)Workaround: Run the following command in Terminal: defaults write com.apple.dt.Xcode DVTDisableMainThreadChecker 1, then deselect Main Thread Checker in the Diagnostic tab of the Run and Test actions for each scheme in your project.

Big Sur 11.0.1 20B28