Learn techniques to help debug any coordinate space issue. View Technote TN3124 >

Identify and resolve synchronization issues when working with NSPersistentCloudKitContainer. View Technote TN3164 >

Explore the details inside the synchronization of NSPersistentCloudKitContainer by capturing and analyzing a sysdiagnose. View Technote TN3163 >

Learn how to identify and handle CloudKit throttles. View Technote TN3162 >

Learn how code signing uses certificates to identify code authors. View Technote TN3161 >

Migrate existing Sign in with Apple user identifiers and private email relay addresses by exchanging transfer identifiers from one developer team to another with the user migration info endpoint. View Technote TN3519 >

Investigate why your universal links are opening in Safari instead of your app. View Technote TN3155 >

Use navigation split view to enable two and three column navigation in your SwiftUI app while maintaining compatibility with earlier OS versions. View Technote TN3154 >

Test your existing apps against EventKit API latest changes. View Technote TN3153 >

Follow these guidelines to update your app to use the new Calendar access levels. View Technote TN3152 >

Learn which networking API is best for you. View Technote TN3151 >

Learn how to fetch and process the most recent changes to the Contacts database. View Technote TN3149 >

Ensure that your app’s local receipt validation is compatible with intermediate certificates that require using the SHA-256 algorithm. View Technote TN3138 >

Understand dataless files and how to minimize the performance impact as the system materializes them. View Technote TN3150 >

Migrate your notarization workflows to notarytool from the deprecated altool. View Technote TN3147 >

Learn about the usage and requirements of “Ambient Viewing Environment” metadata with Dolby Vision™ Profile 8.4 playback. View Technote TN3145 >

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

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

Explore the platforms, packaging, OS versions and device configurations for Network Extension provider deployment. View Technote TN3134 >