Note: For this macOS Big Sur build, you will see the full installer in the main window of the System Preferences > Software Update. If you would rather install the smaller software update, click on the "More Info" link and choose the update for this build.
Important: Updating to macOS Big Sur 11 beta from previous versions of macOS might take significantly longer than expected. Data loss could occur if the update is interrupted. (59101197)
The system Product
is reported as 11.0 only on the Developer Transition Kit at this time. Existing Mac systems will temporarily report the value as 10.16.
VoiceOver is now available while installing macOS Big Sur 11 beta 3. (63025357)
SKStore
and SKProduct
APIs are now available for both macOS and Mac Catalyst apps. (56300909)
You might be unable to open apps after they've been updated. (65816991)
Workaround: Don't update your apps until this issue is marked as resolved. Disable Automatic Updates in App Store > Preferences to prevent inadvertent updates.
See AppKit Release Notes for macOS Big Sur 11 .
You can now set up Auto Unlock. (64120075)
Maps will now lanch as expected when you click the Directions button on a calendar notification. (63697152)
You can now edit Calendar widgets. (63984003)
Accounts are now visible in Preferences. (64117985)
Continuity Handoff is now available in macOS Big Sur 11 beta 3. (64140413)
When setting is
to true
on a MLModel
, the initial download no longer has a significant delay before starting. (64131243)
The default initializer on the auto-generated model interface has been deprecated in favor of init(configuration:)
. Please use init(configuration:)
or the newly introduced .load()
method and handle model load errors as appropriate. (64432588)
The desktop picture now updates correctly after updating to macOS Big Sur 11 beta 3. (64390185)
Auth type events such as ES_EVENT_TYPE_AUTH_EXEC leak kernel memory which will eventually cause your system to become unresponsive. (65750498)
Workaround: Don't subscribe to auth type events.
You're currently unable to capture video using either the built-in camera or external devices. (63528489)
The application might unexpectedly quit when using the Import Media window. (65543216)
Workaround: Drag media from Finder to import it.
You might be unable to update macOS Big Sur 11 Beta 3, if Secure Boot is set to No Security. (63434409)
Your Mac might restart but isn't updated to a newer version of macOS Big Sur 11 Beta. (65298753)
Workaround: Create a bootable installer using the createinstallmedia command.
When updating to macOS Big Sur 11 Beta 3, 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 will reveal 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 beta. (63166401)
APFS containers with non-default allocation block sizes aren't currently supported for installation. (64312561)
If macOS Big Sur 11 beta 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.
Installations no longer pause on Macs that don't have input devices connected. (64348347)
You can now install macOS Big Sur 11 beta 3 onto additional volumes. (63677460, 64445236)
Software Update now correctly indicates that your Mac is enrolled in the Apple Beta Software Program. (64407436)
It's no longer necessary to update to an intermediate macOS release before installing macOS Big Sur 11 beta 3. (64314272)
If you updated to macOS Big Sur 11 beta from a previous version of macOS, Software Update now works as expected. (63158434)
Installation on Core Storage Fusion volumes with FileVault encryption enabled is now supported. (64472080)
The kern
limit has been increased, allowing programs to receive longer argument lists. (48661669)
Darwin kevent
now allows non-parent processes to register for NOTE
, which delivers the same values as the wait()
family of functions in the event data. Refer to the wait4()
man page for more information. This event is subject to the following security checks:
The requesting process is allowed to send signals by sandbox restrictions.
The requesting process and the target process are running as the same user or the requesting process has root privileges. (58134463)
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.
Remote panic dumps aren't currently available. (57915324)
New in macOS Big Sur 11 beta, 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)
kmutil install
might fail to build a development kextcache. (63772702)
Workaround: Copy the release .elides
to the locations of the development .elides
:
sudo cp /path/to/livemount/System/Library/KernelCollections/BootKernelExtensions.kc.elides /path/to/livemount/System/Library/KernelCollections/BootKernelExtensions.kc.development.elides
sudo cp /path/to/livemount/System/Library/KernelCollections/BootKernelExtensions.kc.elides /path/to/livemount/System/Library/KernelCollections/BootKernelExtensions.kc.kasan.elides
sudo cp /path/to/livemount/System/Library/KernelCollections/BootKernelExtensions.kc.elides /path/to/livemount/System/Library/KernelCollections/BootKernelExtensions.kc.debug.elides
sudo cp /path/to/livemount/System/Library/KernelCollections/SystemKernelExtensions.kc.elides /path/to/livemount/System/Library/KernelCollections/SystemKernelExtensions.kc.development.elides
sudo cp /path/to/livemount/System/Library/KernelCollections/SystemKernelExtensions.kc.elides /path/to/livemount/System/Library/KernelCollections/SystemKernelExtensions.kc.kasan.elides
sudo cp /path/to/livemount/System/Library/KernelCollections/SystemKernelExtensions.kc.elides /path/to/livemount/System/Library/KernelCollections/SystemKernelExtensions.kc.debug.elides
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 beta to ensure compatibility. (64262563)
Moving a kernel extension bundle out of /Library/Extensions
might not completely uninstall it. (64331929)
Workaround:
Remove the extension from /Library/Extensions
.
Boot to macOS Recovery.
Run Terminal.
Enter the command kmutil trigger-panic-medic --volume-root /Volumes/<Your
.
Restart your Mac.
No System Extension Updated alerts for third-party kernel extensions which are included in macOS should appear. (64337113)
After removing a DriverKit extension, a restart is no longer required. (63995046)
Adhoc signed kernel extensions now display the developer name in update dialogs and in Security preferences. (64215260)
Kernel extensions using certain deprecated KPIs no longer load. Refer to the support page . While macOS Big Sur remains in development, you can temporarily disable System Integrity Protection to allow these deprecated extensions to load. (55068348)
Certain languages might exhibit clipped or misaligned layout. (63105445)
Certain languages might display unlocalized text. (63105674, 64040564, 64045718)
Some keyboard shortcuts might not work when running macOS Big Sur 11 beta in a language other than English. (63834383)
In Swift, the authorization
property of CLLocation
is incorrectly exposed as a method instead of a property. (62853845)
Widgets only have access to location information if the NSWidget
key is in their Info
. (61953645)
New APIs are available for using os
from Swift as part of the os framework:
A new type Logger
can be instantiated using a subsystem and category and provides methods for logging at different levels ( debug(_:)
, error(_:)
, fault(_:)
).
The Logger
APIs support specifying most formatting and privacy options supported by legacy os
APIs.
The new APIs provide significant performance improvements over the legacy APIs.
You can now pass Swift string interpolation to the os
function.
Note: The new APIs can't be back deployed; however, the existing os
API remains available for back deployment. (22539144)
Content Extensions require a temporary workaround. (57442394)
Workaround: Add the following key/value pair to the NSExtension dictionary in the Info
: "NSExtension
.
The new PHPicker
API no longer produces unexpected results. (63631906)
Edits made using Markup aren't currently saved. (64908822)
Keyboard navigation to move focus between controls isn't currently available. (63987810)
You can now type in the photo picker search field when attaching a photo. (60011306)
If Messages is launched immediately after logging into iCloud, a login window is no longer displayed. (56309057)
Messages Preferences are now accessible. (64122975)
Autocomplete fields and conversation titles are now visible while Messages is in full-screen mode. (64134303)
You no longer receive an alert that indicates the maximum number of pinned conversations has been reached. (62919406)
The first and last name fields in Messages Preferences are now aligned. (64346872)
Message outlines are no longer missing when printing or exporting a conversation as a PDF. (64181169)
The logs
property is now available from Swift while using Shader Validation. (64055248)
You no longer need to reset the password for a Standard account after migration. (63878129)
The user interface now looks correct when running Motion on macOS Big Sur 11 beta 3. (62531765)
Music no longer quits unexpectedly while using the search field. (64183834)
Experimental HTTP/3 support can be enabled in Safari via Experimental Features in the Developer menu, and enabled system-wide using the Terminal command defaults write -g CFNetwork
. (62969220)
HTTP/3 Draft 29 isn't yet supported. (63524866)
Regular and emergency Wi-Fi Calling using iPadOS 14 beta, macOS Big Sur 11 beta, and watchOS 7 beta are now available for T-Mobile USA customers. (63078572)
Importing Quartz or PDFKit frameworks in the macOS SDK no longer results in errors. (63886438)
The new Debug
struct has been renamed to Model
, and its shader
property has been renamed to shader
. (64275817)
Support for Web Extensions is now available. Existing Chrome and Firefox extensions can be converted for Safari using xcrun safari-web-extension-converter
and distributed through the App Store for use in Safari 14. (55707949)
Webpage Translation is now available in the U.S. and Canada. Supported languages include English, Spanish, Simplified Chinese, French, German, Russian, and Brazilian Portuguese. Safari will automatically detect if translation is available based on your Preferred Languages list. (64437861)
Safari no longer quits unexpectedly when opening the Start Page if Frequently Visited Sites are visible as thumbnails. (63945984)
If you enter an incorrect password when joining a Wi-Fi network, the Continue and Back buttons become disabled. (65630352)
Workaround: Restart your Mac to run Setup Assistant again.
If you can't find an application using Spotlight, launch the application at least once using Finder. (64463806)
Typing quickly in a search query in Spotlight no longer causes the result from a previous search to appear. (64428836)
Scene
is now supported. (63190637)
Navigation
panes are now automatically resizable and no longer require an explicit frame. (63941018)
user
, on
, on
are now supported. (64513929)
List
may now be used with Scroll
. (35471164)
Text
gains a new initializer accepting a Formatter
. (63641785)
body
is now implicitly a View
and body
is now implicitly a Scene
. (63606493)
A new redaction reason API for applying placeholder Text
treatment is now available. (63288447)
Date
no longer resets focus on edits. (60077006)
on
callbacks work reliably in all layouts. (63031598)
Using Container
works inside the clip
modifier. (64325583)
The Scene
property wrapper is now supported. (64414712)
A Label
used with a symbol image is now aligned correctly. (60193698)
Nested disclosure groups generated by Outline
no longer produce unexpected results. (64097731)
Disclosure groups in Form
no longer produce unexpected results. (64079102)
Touch ID now stays enabled on Macs with a T2 Security Chip after installing multiple operating systems. (62608379)
Some third-party scripts might produce unexpected results due to the change in macOS version from 10.x to 11. (62477208)
Workaround: Set SYSTEM
in the calling environment, for example: $ SYSTEM
Thumbnail images in certain applications might display unexpected visual artifacts. (65173969)
CMake now installs and runs as expected. (62905973)
Unsigned apps and app extensions no longer receive nil
from calls to container
when a URL was received with earlier versions of macOS. (64290206)
APFS-formatted backup volumes are now supported for faster, more compact, and more reliable backups. New local and network Time Machine backup destinations are formatted as APFS by default. Time Machine will continue backing up to existing HFS backup volumes. (65155545)
The home folder isn't deleted when removing a user, even if you select the option to delete it. (65558783)
The Hypervisor framework now requires the com
entitlement. (63960391)
A new Virtualization
framework provides high-level APIs to run Linux in a virtual machine. (64492914)
Apple Pay support is now available to Mac Catalyst apps. Two methods have been added to existing delegate protocols. No changes are required for iPad apps, but one or both of these methods must be implemented when building for Catalyst. (64187739)
The first method is an addition to the PKPayment
protocol: presentation
. This method is required for Catalyst when using PKPayment
, because PKPayment
, unlike PKPayment
, doesn't have knowledge of the window requesting presentation of the payment sheet. Pass back the UIWindow
instance displaying the UI requesting the payment, for example, My
. This method is marked as required when building for Catalyst, but is otherwise optional.
The second method depends on whether you're using PKPayment
or PKPayment
. For PKPayment
, use payment
. For PKPayment
, use payment
.
This method must be implemented to request a merchant session via your server, and return it via the handler. This mirrors the security model used in WebKit, and replaces listing merchant IDs in the app's Apple Pay entitlements. This method in turn uses the following class to send back results:
API_AVAILABLE(macos(10.16), ios(14.0), watchos(7.0))
@interface PKPaymentRequestMerchantSessionUpdate : NSObject
- (instancetype)initWithStatus:(PKPaymentAuthorizationStatus)status
merchantSession:(nullable PKPaymentMerchantSession *)session;
@property (nonatomic, assign) PKPaymentAuthorizationStatus status;
@property (nullable, nonatomic, strong) PKPaymentMerchantSession *session;
@end
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