Xcode 12.5.1 Release Notes

Update your apps to use new features, and test your apps against API changes.

Overview

Xcode 12.5.1 includes SDKs for iOS 14.5, iPadOS 14.5, tvOS 14.5, watchOS 7.4, and macOS Big Sur 11.3. The Xcode 12.5.1 release supports on-device debugging for iOS 9 and later, tvOS 9 and later, and watchOS 2 and later. Xcode 12.5.1 requires a Mac running macOS Big Sur 11 or later.

Debugging

Resolved Issues

• Improved the performance of the Variables View in very large projects. (75381959, 78035413)

Signing and Distribution

Resolved Issues

• Resolved an issue in which Xcode failed to codesign using a smart card. (78035219)

Source Control

Known Issues

• When you select Upload Key after you clone a repository from a source control provider and associate a locally-generated key with that repository, Xcode doesn’t upload the key. (78824500)

  Workaround: Add the key using the source control provider’s website.

Swift Packages

Resolved Issues

• Fixed an issue where swift build exited silently when building a program with package dependencies and a large compiler crash output. (77558631)

• Fixed an issue where command-line builds of packages sometimes didn’t print a “Build complete!” message. (77669218)

Known Issues

• Authentication may fail when using Xcode Server with Swift Packages. (77331504)

  Workaround: Add -scmProvider xcode to the xcodebuild arguments in the bot’s configuration.

Testing

Resolved Issues

• Fixed an issue which caused XCTest UI Recording to not emit automation code in iOS, tvOS, or watchOS. (77511696) (FB9096691)

Known Issues

• UI interruption monitors don’t work in watchOS. (59571331)

• UI Test Recording fails to generate code for iOS Simulator targets if recording starts after code execution stops at a breakpoint. (77924295)

  Workaround: With no breakpoint set, place your cursor within a test method and press the record button.