Use AVAudioConverter to perform sample rate conversions between PCM audio buffers. View Technote TN3136 >

Learn about the supported use cases for low-level networking on watchOS. View Technote TN3135 >

Distribute a Metal renderer in a Swift package. View Technote TN3133 >

Learn how the keychain on macOS differs from other Apple platforms. View Technote TN3137 >

About technotes Technotes are focused, timely documents from Apple Developer Technical Support. They explore a wide range of development topics and provide guidance for developers creating apps and accessories for all of Apple’s platforms. Learn about specific development topics through these in-depth technical articles. You can subscribe to the RSS feed to get notified when new technotes are published.  Each technote has its own Developer Forums post. We encourage you to discuss the technotes and share your feedback. Let us know if a technote is helpful, or what we can do to improve it. We would appreciate it if you include a Feedback Assistant (FB) number so we can easily track your feedback, and let you know when it’s resolved. Provide feedback You can provide feedback about a specific technote (or technotes as a whole) using Feedback Assistant. When filing, use the following path when creating new feedback: What are you seeing an issue with? Developer Tools Which area are you seeing an issue with? Developer Documentation What does the documentation issue you are reporting involve? Technotes Please provide the URL of the content you reporting an issue with: The complete URL of the technote, e.g. https://developer.apple.com/documentation/technotes/tn3102-http3-in-your-app (If you wish to leave feedback on Technotes in general, use https://developer.apple.com/documentation/technotes for the URL.) Then complete the remaining fields appropriately. We appreciate and look forward to your feedback.

Learn how provisioning profiles enable third-party code to run on Apple platforms. View Technote TN3125 >

Use an anonymous XPC listener to simplify your XPC testing and debugging. View Technote TN3113 >

Get started with iOS 15’s new HTTP/3 support. View Technote TN3102 >

Explore the various Wi-Fi APIs available on iOS and their expected use cases. View Technote TN3111 >

Review common causes for failing Xcode Cloud builds that originate from helper tools running in a misconfigured build environment. View Technote TN3129 >

Update your app’s architecture build settings to support building macOS, iOS, watchOS and tvOS apps on Apple silicon. View Technote TN3117 >

Learn strategies and techniques for refactoring a single storyboard into multiple storyboards. View Technote TN3123 >

Understand why your app’s launch screen is not displayed or updated. View Technote TN3118 >

Handle common issues that arise while archiving apps. View Technote TN3109 >

Troubleshooting guide for implementing Apple Pay on the Web. View Technote TN3103 >

Configure pieces of an AVCaptureSession to capture video in Apple ProRes. View Technote TN3104 >

Configure the device’s status bar style to work well with your app’s user interface. View Technote TN3105 >

Adopt UINavigationBarAppearance for a navigation bar background color that’s consistent on iOS 13 and later. View Technote TN3106 >

Diagnose errors received by the Sign in with Apple client, or its server infrastructure by identifying the underlying causes of common error codes and explore their potential solutions. View Technote TN3107 >

Learn how to navigate to the interface file of a Swift implementation file. View Technote TN3108 >