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Overview
The macOS 11 SDK supports developing applications for Macs running macOS Big Sur 11. The SDK is bundled with Xcode 12.2 beta and can be obtained from the Beta software download . For information about Xcode 12.2 compatibility requirements, please refer to " Xcode 12.2 Beta Release Notes" .
general
Known issues
important
Upgrading from the previous macOS version to macOS Big Sur 11 beta may take longer than expected. If the update is interrupted, data loss may occur. (59101197)
AppKit
Apple Security Bounty
- macOS Big Sur 11 beta 8 is designated as eligible for a 50% Apple Security Bounty bonus to resolve issues unknown to Apple or reintroduced in this version. For more information, see Apple Security Bounty .
Installer and software update
Known issues
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When updating from macOS Big Sur 11 beta 2 to macOS Big Sur 11 beta 3 or later, unexpected large downloads may be provided instead of incremental software updates. (65753086)
**Workaround:** Under the "Another update is available" text, click the "More Information..." link. This will display incremental updates, where you can click the "Install Now" button.
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You may need to adjust the "Energy Saver" settings so that your Mac will not go to sleep when it is ready to install macOS Big Sur 11 beta. (63166401)
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If macOS Big Sur 11 beta and the previous version of macOS Catalina 10.15 are installed in the same APFS container, the system software update will no longer be installed on the previous version of macOS. (64411484)
**Solution:** Update the previous version of macOS Catalina to 10.15.6.
core
Solved in macOS Big Sur 11 beta 8
- Kernel issues no longer cause applications to exit unexpectedly. (69093270)
SwiftUI
Known issues
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ProgressViewThe general type signature has been changed and general parameters have been added. This change does not require any source changes, but will cause applications compiled with an earlier beta SDK to exit unexpectedly. (63580200)currentValueLabel**Solution:** Recompile the macOS Big Sur 11 Beta 6 or higher version of the application to solve this problem.
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When dragging and dropping dynamic view content, sometimes the drag and drop operation may fail. (68281403)
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Dynamically updated content may not update correctly or cause the application to exit unexpectedly. (58820037)
OutlineGroup -
DisclosureGroupThe binding does not work as expected. (58820037)isExpandedList -
Some standard menu items are missing from the main menu, such as "Open Recent History" or "Window" menu items. (63998004)
third-party usage
Known issues
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When using an earlier version of Parallels Desktop 16, you may experience a kernel panic. (67358596)
**Solution:** Upgrade to the latest version of Parallels Desktop 16.
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Due to the change of macOS version from 10.x to 11, some third-party scripts may produce unexpected results. (62477208)
**Solution: **Set in the calling environment, for example:
SYSTEM_VERSION_COMPAT=1``$ SYSTEM_VERSION_COMPAT=1 legacy_script.pl
UIKit
Known issues
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After using the new Pasteboard API, the pasteboard may return empty data. (67857457)
detectPatternsForPatterns:completionHandler:**Workaround:** If you need to access the value that matches the detected pattern, please use the API.
detectValuesForPatterns:completionHandler:
wallet
Known issues
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isPassLibraryAvailable()It cannot be ensured that the transfer library function between the platform and the device is uniformly available. (60697880)**Workaround:** Call a more specific API to check the available functions, for example.
canAddPasses()
Xcode
Known issues
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Older versions of Xcode prior to 11.5 may exit unexpectedly during startup. (59991056)
**Solution:** Run the following command in the terminal:, and then deselect "Main Thread Checker" in the "Diagnostics" tab of the "Run and Test" operation for each scenario in the project.
defaults write com.apple.dt.Xcode DVTDisableMainThreadChecker 1 -
The command line toolkit for Xcode 12.2 beta is currently not available. (69012274)