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A Summary of the WWDC25 Group Lab - watchOS (Part 2)
At WWDC25 we launched a new type of Lab event for the developer community - Group Labs. A Group Lab is a panel Q&A designed for a large audience of developers. Group Labs are a unique opportunity for the community to submit questions directly to a panel of Apple engineers and designers. Here are the highlights from the WWDC25 Group Lab for watchOS (part 2). 7. For widget (complication) update budgets, is there an overall budget or are scheduled update separate from APNS updates? For context I have a complication that is updated on a fixed schedule (every 20 min), but there can be times of the day that are more "interesting" where pushes make sense. Like timeline updates, the system budgets WidgetKit push notifications and delivers them opportunistically. You can use WidgetKit push notification updates as an addition to timeline updates. For more information, see Updating widgets with WidgetKit push notifications. 8. It seems like the new Control Center widgets can be sourced from either the iPhone or directly on the Watch. Can we control whether a control appears in the watch list, or will it always be a combination of all controls from both sources? iPhone controls will be automatically available on the companion Apple Watch, even if they don’t have an associated watchOS app. When an iPhone control is tapped on the Apple Watch, the action is performed on the iPhone. Controls whose actions foreground the iOS app will not appear on Apple Watch. If a watchOS app has controls, no controls will appear on Apple Watch from the companion iOS app. 9. From UI/UX perspective, what are the current practices for Designing watchOS apps that feels native. The WWDC23 session Design and build apps for WatchOS 10 covers the details of watchOS design principles and how to apply them in your app using SwiftUI. A lot of SwiftUI APIs, such as NavigationSplitView, vertical tab view, list view, and etc, already implement the look and feel native to watchOS. 10. When adopting the new design system on watchOS, it seems like the main place we will use the glass effect is for our buttons in toolbar? Standard buttons in system apps seem to continue to use a flat appearance and full width. We leave the choice to you – You can use the new GlassButtonStyle API or .buttonStyle(.glass) to apply the liquid glass material to buttons. Learn when to use the Liquid Glass styles in Get to know the new design system. 11. Is there any way to gracefully migrate extensions when their bundleIDs have to change? e.g., converting a multi-target watch app to single-target, which drops the .watchkitextension from both the app and WidgetKit ext bundleIDs Updating a watchOS app to single-target is covered in TechNote TN3157: Updating your watchOS project for SwiftUI and WidgetKit. Xcode provides a tool that can do the update automatically, and the technote describes the details about how to use it and how to clean up the project after the automatic update. If there's something that technote doesn't address, please reach out to us on the Developer Forums. 12. What is the status of WatchConnectivity? Is that still the preferred way for iOS + watchOS communications? The Watch Connectivity framework is still supported, and is appropriate for the communication between an watchOS app and its companion iOS app. The systems also provide other APIs for the apps to exchange data. For example, watchOS supports Apple Push Notification service (APNs). If data for your widget changes on your server, your widget can receive a WidgetKit push notification, and update accordingly. That’s the preferred mechanism for widget updates.
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167
Jul ’25
softwareupdate utility not listing macOS 26 installer for a valid Apple Silicon machine
Given that I have enabled System Settings -> General -> Software Update -> Beta Updates -> macOS Tahoe 26 Developer Beta. When I run the following command: softwareupdate --list-full-installers I'm not seeing macOS 26 within the resulting list: ➜ softwareupdate --list-full-installers Finding available software Software Update found the following full installers: * Title: macOS Sequoia, Version: 15.5, Size: 15283299KiB, Build: 24F74, Deferred: NO * Title: macOS Sequoia, Version: 15.4.1, Size: 15244333KiB, Build: 24E263, Deferred: NO * Title: macOS Sequoia, Version: 15.4, Size: 15243957KiB, Build: 24E248, Deferred: NO * Title: macOS Sequoia, Version: 15.3.2, Size: 14890483KiB, Build: 24D81, Deferred: NO * Title: macOS Sequoia, Version: 15.3.1, Size: 14891477KiB, Build: 24D70, Deferred: NO * Title: macOS Sonoma, Version: 14.7.6, Size: 13338327KiB, Build: 23H626, Deferred: NO * Title: macOS Sonoma, Version: 14.7.5, Size: 13337289KiB, Build: 23H527, Deferred: NO * Title: macOS Sonoma, Version: 14.7.4, Size: 13332546KiB, Build: 23H420, Deferred: NO * Title: macOS Ventura, Version: 13.7.6, Size: 11910780KiB, Build: 22H625, Deferred: NO * Title: macOS Ventura, Version: 13.7.5, Size: 11916960KiB, Build: 22H527, Deferred: NO * Title: macOS Ventura, Version: 13.7.4, Size: 11915317KiB, Build: 22H420, Deferred: NO * Title: macOS Monterey, Version: 12.7.4, Size: 12117810KiB, Build: 21H1123, Deferred: NO Is there an issue with the softwareupdate utility?
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207
Jun ’25
How to reset system window private picker alert with Screen Capture Kit
Hi, I would like to reset system window private picker alert with ScreenCapture kit. i can reset the ScreenCapture permission with tccutil reset ScreenCapture. but it does not reset the system window private picker alert. i tried deleting the application directory from container and it does not help. the system window private picker alert uses the old approval i gave and it does not prompt a new alert. How can i starta with fresh screencapture kit settings for an app in testing? Thanks
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140
Jun ’25
ShieldConfiguration: Shield does not update when token is moved from one store to anohter (while in foreground)
Hello, I have noticed that the ShieldConfiguration is only requested when opening a target app, and never when the application token is moved to a different shield while the target app remains in foreground. This causes problems because many times the wrong ShieldConfiguration is displayed (recycled) instead of requesting a new ShieldConfiguration. This bug has been around since the introduction of the Screen Time API in 2020 and is has not been addressed. Bug reports: FB14237883 FB17902392 Please fix asap!! Not acceptable to have bugs not being addressed for more than 5 years. Most concerning: This is still reproducing on iOS 26 beta 7!! Thanks a lot for your help.
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352
Aug ’25
Missing "Dolby Vision Profile" Option in Deliver Page - DaVinci Resolve 20 on iPadOS 26
Dear Support Team, ​I am writing to seek technical assistance regarding a persistent issue with Dolby Vision exporting in DaVinci Resolve 20 on my iPad Pro 12.9-inch (2021, M1 chip) running iPadOS 26.0.1. ​The Issue: Despite correctly configuring the project for a Dolby Vision workflow and successfully completing the dynamic metadata analysis, the "Dolby Vision Profile" dropdown menu (and related embedding options) is completely missing from the Advanced Settings in the Deliver page. ​My Current Configuration & Steps Taken: ​Software Version: DaVinci Resolve Studio 20 (Studio features like Dolby Vision analysis are active and functional). ​Project Settings: Color Science: DaVinci YRGB Color Managed. ​Dolby Vision: Enabled (Version 4.0) with Mastering Display set to 1000 nits. ​Output Color Space: Rec.2100 ST2084. ​Color Page: Dynamic metadata analysis has been performed, and "Trim" controls are functional. ​Export Settings: ​Format: QuickTime / MP4. ​Codec: H.265 (HEVC). ​Encoding Profile: Main 10. ​The Problem: Under "Advanced Settings," there is no option to select a Dolby Vision Profile (e.g., Profile 8.4) or to "Embed Dolby Vision Metadata." ​Potential Variables: ​System Version: I am currently running iPadOS 26. ​Apple ID: My iPad is currently not logged into an Apple ID. I suspect this might be preventing the app from accessing certain system-level AVFoundation frameworks or Dolby DRM/licensing certificates required for metadata embedding. ​Could you please clarify if the "Dolby Vision Profile" option is dependent on a signed-in Apple ID for hardware-level encoding authorization, or if this is a known compatibility issue with the current iPadOS 26 build? ​I look forward to your guidance on how to resolve this. ​Best regards, INSOFT_Fred
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193
Feb ’26
Proper way to create an AppleEvent record descriptor from NSDictionary
When using NSScriptCommand, is there any way to create an NSAppleEventDescriptor from an NSDictionary with arbitrary keys without using keyASUserRecordFields? Am I correct in thinking that this constant is deprecated? I ask because there is still active documentation using it. Is there another way to return a record where the keys aren't known at compile-time?
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153
Apr ’25
CarPlay Simulator: How to Change Dock Position for Right-Hand Drive (RHD)
Hello everyone, I'm developing a CarPlay app and am trying to test it with the dock on the right side of the screen, as is standard for right-hand drive vehicles like those in Japan. Currently, the CarPlay Simulator always displays the dock on the left, and I can't find an option to change its position. This is important for ensuring a proper user experience for my target market. Has anyone figured out how to configure the simulator for RHD layouts? Any guidance on how to move the dock to the right would be greatly appreciated. Thanks in advance for your help!
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144
Sep ’25
Transfer meta data from AppIntent to main app on `continueInForeground`
Hello! I am excited to try out the new continueInForeground API with iOS 26. I was wondering, what is the suggested way to transport meta data to the main app? Before, with SiriKit intents I would use the .onContinueUserActivity() API and were able to pass a NSUserActivity from the Shortcut to the Main app. Now, with the continueInForeground() call I am not sure – what would be your suggestion? Of course, I can store some data in UserDefaults, but that feels like a workaround. Happy to get some input on this! Thanks a lot and have a great day!
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230
Jun ’25
How to debug a CoreSpotlight extension?
My CoreSpotlight extension seems to exceed the 6 MB memory limit. What’s the best way to debug this? I've tried to attach the debugger on the Simulator but the extension seems to be never launched when I trigger the reindex from Developer settings. Is this supposed to work? On device, I am able to attach the debugger. However, I can neither transfer the debug session to Instruments, nor display the memory graph. So I've no idea how the memory is used. Any recommendations how to move forward? Is there a way to temporarily disable the memory limit since even with LLDB attached, the extension is killed.
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198
Apr ’25
Increased crash occurrence in iOS 26.4
Hello. Our application performs encoding and decoding of large json files which sometimes may take up to 1,5GB of RAM memory. We understand that this may be a problem for devices with low RAM memory (3GB). But before iOS 26.4 we didn't have much occurrences (3 for the last 90 days). Starting from iOS 26.4 it started to crash a lot. Can the reason be that iOS 26.4 occupies more RAM memory so there is less memory left for our app? Or maybe starting from iOS 26.4 there is less RAM memory allocated per app? The crash message is Fatal error: failed to allocate 392 bytes of memory with alignment 8
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169
1w
Clarification on Disk Write Limits (bug_type 145) and Cross-Volume Write Amplification
Hello Apple Developer Support and Community, I am a senior software engineer investigating a Disk Writes Resource Violation (bug_type 145) for a photo-management application (BeePhotos v2.3.0). We observed a violation where the app dirtied approximately 1GB of file-backed memory in just 48 seconds, triggering a resource report. [Core Diagnostic Data] The following data is extracted from the .crash report: Event: disk writes Action taken: none Writes caused: 1073.96 MB over 48.28s (Average: 22.24 MB/second) System Limit: 1073.74 MB over 86,400 seconds (Daily limit) Device: iPhone 15 Pro (iPhone16,2) OS Version: iOS 26.4 (Build 23E244) Free Space: 3852.25 MB (Approx. 3.8 GB) [Implementation Details] Our application performs the following sequence for a 1GB video download: Download: Uses NSURLSessionDownloadTask to download the file to the system-provided location URL (in the /tmp or com.apple.nsurlsessiond directory). Move: In didFinishDownloadingToURL, we move the file to the App’s sandbox Library/Caches directory using FileManager.default.moveItem(at:to:). Save: We then add the file to the Photo Library via PHAssetCreationRequest.addResource(with:fileURL:options:) using the local URL in Library/Caches. [Technical Questions] I suspect the 1GB download is being "amplified" into ~3GB of total physical writes, and I would like to confirm the following: Cross-Volume Move: Does moving a file from the nsurlsessiond managed temporary directory to the App’s sandbox Library/Caches constitute a Cross-Volume Move on APFS? If so, does this effectively double the write count (1GB download + 1GB copy-on-move)? PHPhotoLibrary Ingestion: When using PHAssetCreationRequest, does the system perform another 1:1 data copy of the source file into the assets database? Would this result in a 3rd GB of writing? Low Disk Space Impact: Given the device only had 3.85 GB free, does the system’s "low disk space" state (near the 150MB threshold) increase the overhead for metadata updates or physical write amplification that counts towards this limit? Best Practices: To stay within the daily 1GB budget for high-resolution media, is it recommended to call PHAssetCreationRequest directly using the location URL from didFinishDownloadingToURL to avoid intermediary copies? Are there any permission or lifecycle risks with this approach? Any insights from the Apple engineering team or the community on how to minimize the write footprint during high-speed ingestion would be highly appreciated. Best regards
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8h
Disambiguation for .system.search AppIntent
I'd like to display a list of items to disambiguate for a fulltext search intent. Using the Apple AppIntentsSampleApp, I added TrailSearch.swift: import AppIntents @AssistantIntent(schema: .system.search) struct TrailSearch: AppIntent { static let title: LocalizedStringResource = "Search Trail" static let description = IntentDescription("Search trail by name.", categoryName: "Discover", resultValueName: "Trail") @Parameter(title: "Trail") var criteria: StringSearchCriteria func perform() async throws -> some IntentResult & ReturnsValue<TrailEntity> { if criteria.term.isEmpty { throw $criteria.needsValueError(IntentDialog("need value")) } let trails = TrailDataManager.shared.trails { trail in trail.name.contains(criteria.term) } if trails.count > 1 { throw $criteria.needsDisambiguationError(among: trails.map { StringSearchCriteria(term: $0.name) }) } else if let firstTrail = trails.first { return .result(value: TrailEntity(trail: firstTrail)) } throw $criteria.needsValueError(IntentDialog("Nothing found")) } } Now when I type "trail" which matches several trails and thus lets us enter the disambiguation code path, the Shortcut app just displays the dialog title but no disambiguation items to pick from. Is this by design or a bug? (filed as FB17412220)
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118
Apr ’25
A Summary of the WWDC25 Group Lab - watchOS (Part 2)
At WWDC25 we launched a new type of Lab event for the developer community - Group Labs. A Group Lab is a panel Q&A designed for a large audience of developers. Group Labs are a unique opportunity for the community to submit questions directly to a panel of Apple engineers and designers. Here are the highlights from the WWDC25 Group Lab for watchOS (part 2). 7. For widget (complication) update budgets, is there an overall budget or are scheduled update separate from APNS updates? For context I have a complication that is updated on a fixed schedule (every 20 min), but there can be times of the day that are more "interesting" where pushes make sense. Like timeline updates, the system budgets WidgetKit push notifications and delivers them opportunistically. You can use WidgetKit push notification updates as an addition to timeline updates. For more information, see Updating widgets with WidgetKit push notifications. 8. It seems like the new Control Center widgets can be sourced from either the iPhone or directly on the Watch. Can we control whether a control appears in the watch list, or will it always be a combination of all controls from both sources? iPhone controls will be automatically available on the companion Apple Watch, even if they don’t have an associated watchOS app. When an iPhone control is tapped on the Apple Watch, the action is performed on the iPhone. Controls whose actions foreground the iOS app will not appear on Apple Watch. If a watchOS app has controls, no controls will appear on Apple Watch from the companion iOS app. 9. From UI/UX perspective, what are the current practices for Designing watchOS apps that feels native. The WWDC23 session Design and build apps for WatchOS 10 covers the details of watchOS design principles and how to apply them in your app using SwiftUI. A lot of SwiftUI APIs, such as NavigationSplitView, vertical tab view, list view, and etc, already implement the look and feel native to watchOS. 10. When adopting the new design system on watchOS, it seems like the main place we will use the glass effect is for our buttons in toolbar? Standard buttons in system apps seem to continue to use a flat appearance and full width. We leave the choice to you – You can use the new GlassButtonStyle API or .buttonStyle(.glass) to apply the liquid glass material to buttons. Learn when to use the Liquid Glass styles in Get to know the new design system. 11. Is there any way to gracefully migrate extensions when their bundleIDs have to change? e.g., converting a multi-target watch app to single-target, which drops the .watchkitextension from both the app and WidgetKit ext bundleIDs Updating a watchOS app to single-target is covered in TechNote TN3157: Updating your watchOS project for SwiftUI and WidgetKit. Xcode provides a tool that can do the update automatically, and the technote describes the details about how to use it and how to clean up the project after the automatic update. If there's something that technote doesn't address, please reach out to us on the Developer Forums. 12. What is the status of WatchConnectivity? Is that still the preferred way for iOS + watchOS communications? The Watch Connectivity framework is still supported, and is appropriate for the communication between an watchOS app and its companion iOS app. The systems also provide other APIs for the apps to exchange data. For example, watchOS supports Apple Push Notification service (APNs). If data for your widget changes on your server, your widget can receive a WidgetKit push notification, and update accordingly. That’s the preferred mechanism for widget updates.
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167
Activity
Jul ’25
The math formula can’t be displayed normally
At present, all my apps cannot display normally
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0
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0
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39
Activity
Jun ’25
softwareupdate utility not listing macOS 26 installer for a valid Apple Silicon machine
Given that I have enabled System Settings -> General -> Software Update -> Beta Updates -> macOS Tahoe 26 Developer Beta. When I run the following command: softwareupdate --list-full-installers I'm not seeing macOS 26 within the resulting list: ➜ softwareupdate --list-full-installers Finding available software Software Update found the following full installers: * Title: macOS Sequoia, Version: 15.5, Size: 15283299KiB, Build: 24F74, Deferred: NO * Title: macOS Sequoia, Version: 15.4.1, Size: 15244333KiB, Build: 24E263, Deferred: NO * Title: macOS Sequoia, Version: 15.4, Size: 15243957KiB, Build: 24E248, Deferred: NO * Title: macOS Sequoia, Version: 15.3.2, Size: 14890483KiB, Build: 24D81, Deferred: NO * Title: macOS Sequoia, Version: 15.3.1, Size: 14891477KiB, Build: 24D70, Deferred: NO * Title: macOS Sonoma, Version: 14.7.6, Size: 13338327KiB, Build: 23H626, Deferred: NO * Title: macOS Sonoma, Version: 14.7.5, Size: 13337289KiB, Build: 23H527, Deferred: NO * Title: macOS Sonoma, Version: 14.7.4, Size: 13332546KiB, Build: 23H420, Deferred: NO * Title: macOS Ventura, Version: 13.7.6, Size: 11910780KiB, Build: 22H625, Deferred: NO * Title: macOS Ventura, Version: 13.7.5, Size: 11916960KiB, Build: 22H527, Deferred: NO * Title: macOS Ventura, Version: 13.7.4, Size: 11915317KiB, Build: 22H420, Deferred: NO * Title: macOS Monterey, Version: 12.7.4, Size: 12117810KiB, Build: 21H1123, Deferred: NO Is there an issue with the softwareupdate utility?
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0
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1
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207
Activity
Jun ’25
How to reset system window private picker alert with Screen Capture Kit
Hi, I would like to reset system window private picker alert with ScreenCapture kit. i can reset the ScreenCapture permission with tccutil reset ScreenCapture. but it does not reset the system window private picker alert. i tried deleting the application directory from container and it does not help. the system window private picker alert uses the old approval i gave and it does not prompt a new alert. How can i starta with fresh screencapture kit settings for an app in testing? Thanks
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0
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0
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140
Activity
Jun ’25
Exiting an App Clip
After a user has launched an App Clip Experience from Safari and is done with the activity that the App Clip provides – is there a way for the App Clip to programatically close itself so the user returns to Safari?
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0
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110
Activity
Jun ’25
NFC application
Does mobile NFC support copying Mifare cards
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0
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0
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73
Activity
May ’25
Apple watch 天气问题
在watchOS11.5下,Apple watch无法加载天气。无论是否连接自己的iPhone均无法加载
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0
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0
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236
Activity
May ’25
Data roaming or cellular profile or shortcut
Is there a way to create a data roaming or cellular profile or shortcut so that we can turn data off for certain sets of apps when we travel (and turn them all back on when we're back)?
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0
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0
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112
Activity
Nov ’25
ShieldConfiguration: Shield does not update when token is moved from one store to anohter (while in foreground)
Hello, I have noticed that the ShieldConfiguration is only requested when opening a target app, and never when the application token is moved to a different shield while the target app remains in foreground. This causes problems because many times the wrong ShieldConfiguration is displayed (recycled) instead of requesting a new ShieldConfiguration. This bug has been around since the introduction of the Screen Time API in 2020 and is has not been addressed. Bug reports: FB14237883 FB17902392 Please fix asap!! Not acceptable to have bugs not being addressed for more than 5 years. Most concerning: This is still reproducing on iOS 26 beta 7!! Thanks a lot for your help.
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0
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2
Views
352
Activity
Aug ’25
Missing "Dolby Vision Profile" Option in Deliver Page - DaVinci Resolve 20 on iPadOS 26
Dear Support Team, ​I am writing to seek technical assistance regarding a persistent issue with Dolby Vision exporting in DaVinci Resolve 20 on my iPad Pro 12.9-inch (2021, M1 chip) running iPadOS 26.0.1. ​The Issue: Despite correctly configuring the project for a Dolby Vision workflow and successfully completing the dynamic metadata analysis, the "Dolby Vision Profile" dropdown menu (and related embedding options) is completely missing from the Advanced Settings in the Deliver page. ​My Current Configuration & Steps Taken: ​Software Version: DaVinci Resolve Studio 20 (Studio features like Dolby Vision analysis are active and functional). ​Project Settings: Color Science: DaVinci YRGB Color Managed. ​Dolby Vision: Enabled (Version 4.0) with Mastering Display set to 1000 nits. ​Output Color Space: Rec.2100 ST2084. ​Color Page: Dynamic metadata analysis has been performed, and "Trim" controls are functional. ​Export Settings: ​Format: QuickTime / MP4. ​Codec: H.265 (HEVC). ​Encoding Profile: Main 10. ​The Problem: Under "Advanced Settings," there is no option to select a Dolby Vision Profile (e.g., Profile 8.4) or to "Embed Dolby Vision Metadata." ​Potential Variables: ​System Version: I am currently running iPadOS 26. ​Apple ID: My iPad is currently not logged into an Apple ID. I suspect this might be preventing the app from accessing certain system-level AVFoundation frameworks or Dolby DRM/licensing certificates required for metadata embedding. ​Could you please clarify if the "Dolby Vision Profile" option is dependent on a signed-in Apple ID for hardware-level encoding authorization, or if this is a known compatibility issue with the current iPadOS 26 build? ​I look forward to your guidance on how to resolve this. ​Best regards, INSOFT_Fred
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0
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0
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193
Activity
Feb ’26
开发者账户无法注册
在Developer app中现在注册按钮时置灰等,无法点击,我发送的联系邮件也没有得到回应,有什么办法解决吗
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0
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1
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296
Activity
Jan ’26
Proper way to create an AppleEvent record descriptor from NSDictionary
When using NSScriptCommand, is there any way to create an NSAppleEventDescriptor from an NSDictionary with arbitrary keys without using keyASUserRecordFields? Am I correct in thinking that this constant is deprecated? I ask because there is still active documentation using it. Is there another way to return a record where the keys aren't known at compile-time?
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0
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0
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153
Activity
Apr ’25
CarPlay Simulator: How to Change Dock Position for Right-Hand Drive (RHD)
Hello everyone, I'm developing a CarPlay app and am trying to test it with the dock on the right side of the screen, as is standard for right-hand drive vehicles like those in Japan. Currently, the CarPlay Simulator always displays the dock on the left, and I can't find an option to change its position. This is important for ensuring a proper user experience for my target market. Has anyone figured out how to configure the simulator for RHD layouts? Any guidance on how to move the dock to the right would be greatly appreciated. Thanks in advance for your help!
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0
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0
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144
Activity
Sep ’25
Testflight
How can I get the Testflight invitation code
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0
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0
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84
Activity
Jun ’25
TestFlight problem
"Bu beta şu anda yeni testçileri kabul etmiyor" Lütfen bu hatayı düzeltin
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0
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0
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177
Activity
Jun ’25
Transfer meta data from AppIntent to main app on `continueInForeground`
Hello! I am excited to try out the new continueInForeground API with iOS 26. I was wondering, what is the suggested way to transport meta data to the main app? Before, with SiriKit intents I would use the .onContinueUserActivity() API and were able to pass a NSUserActivity from the Shortcut to the Main app. Now, with the continueInForeground() call I am not sure – what would be your suggestion? Of course, I can store some data in UserDefaults, but that feels like a workaround. Happy to get some input on this! Thanks a lot and have a great day!
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0
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0
Views
230
Activity
Jun ’25
How to debug a CoreSpotlight extension?
My CoreSpotlight extension seems to exceed the 6 MB memory limit. What’s the best way to debug this? I've tried to attach the debugger on the Simulator but the extension seems to be never launched when I trigger the reindex from Developer settings. Is this supposed to work? On device, I am able to attach the debugger. However, I can neither transfer the debug session to Instruments, nor display the memory graph. So I've no idea how the memory is used. Any recommendations how to move forward? Is there a way to temporarily disable the memory limit since even with LLDB attached, the extension is killed.
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0
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1
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198
Activity
Apr ’25
Increased crash occurrence in iOS 26.4
Hello. Our application performs encoding and decoding of large json files which sometimes may take up to 1,5GB of RAM memory. We understand that this may be a problem for devices with low RAM memory (3GB). But before iOS 26.4 we didn't have much occurrences (3 for the last 90 days). Starting from iOS 26.4 it started to crash a lot. Can the reason be that iOS 26.4 occupies more RAM memory so there is less memory left for our app? Or maybe starting from iOS 26.4 there is less RAM memory allocated per app? The crash message is Fatal error: failed to allocate 392 bytes of memory with alignment 8
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169
Activity
1w
Clarification on Disk Write Limits (bug_type 145) and Cross-Volume Write Amplification
Hello Apple Developer Support and Community, I am a senior software engineer investigating a Disk Writes Resource Violation (bug_type 145) for a photo-management application (BeePhotos v2.3.0). We observed a violation where the app dirtied approximately 1GB of file-backed memory in just 48 seconds, triggering a resource report. [Core Diagnostic Data] The following data is extracted from the .crash report: Event: disk writes Action taken: none Writes caused: 1073.96 MB over 48.28s (Average: 22.24 MB/second) System Limit: 1073.74 MB over 86,400 seconds (Daily limit) Device: iPhone 15 Pro (iPhone16,2) OS Version: iOS 26.4 (Build 23E244) Free Space: 3852.25 MB (Approx. 3.8 GB) [Implementation Details] Our application performs the following sequence for a 1GB video download: Download: Uses NSURLSessionDownloadTask to download the file to the system-provided location URL (in the /tmp or com.apple.nsurlsessiond directory). Move: In didFinishDownloadingToURL, we move the file to the App’s sandbox Library/Caches directory using FileManager.default.moveItem(at:to:). Save: We then add the file to the Photo Library via PHAssetCreationRequest.addResource(with:fileURL:options:) using the local URL in Library/Caches. [Technical Questions] I suspect the 1GB download is being "amplified" into ~3GB of total physical writes, and I would like to confirm the following: Cross-Volume Move: Does moving a file from the nsurlsessiond managed temporary directory to the App’s sandbox Library/Caches constitute a Cross-Volume Move on APFS? If so, does this effectively double the write count (1GB download + 1GB copy-on-move)? PHPhotoLibrary Ingestion: When using PHAssetCreationRequest, does the system perform another 1:1 data copy of the source file into the assets database? Would this result in a 3rd GB of writing? Low Disk Space Impact: Given the device only had 3.85 GB free, does the system’s "low disk space" state (near the 150MB threshold) increase the overhead for metadata updates or physical write amplification that counts towards this limit? Best Practices: To stay within the daily 1GB budget for high-resolution media, is it recommended to call PHAssetCreationRequest directly using the location URL from didFinishDownloadingToURL to avoid intermediary copies? Are there any permission or lifecycle risks with this approach? Any insights from the Apple engineering team or the community on how to minimize the write footprint during high-speed ingestion would be highly appreciated. Best regards
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17
Activity
8h
Disambiguation for .system.search AppIntent
I'd like to display a list of items to disambiguate for a fulltext search intent. Using the Apple AppIntentsSampleApp, I added TrailSearch.swift: import AppIntents @AssistantIntent(schema: .system.search) struct TrailSearch: AppIntent { static let title: LocalizedStringResource = "Search Trail" static let description = IntentDescription("Search trail by name.", categoryName: "Discover", resultValueName: "Trail") @Parameter(title: "Trail") var criteria: StringSearchCriteria func perform() async throws -> some IntentResult & ReturnsValue<TrailEntity> { if criteria.term.isEmpty { throw $criteria.needsValueError(IntentDialog("need value")) } let trails = TrailDataManager.shared.trails { trail in trail.name.contains(criteria.term) } if trails.count > 1 { throw $criteria.needsDisambiguationError(among: trails.map { StringSearchCriteria(term: $0.name) }) } else if let firstTrail = trails.first { return .result(value: TrailEntity(trail: firstTrail)) } throw $criteria.needsValueError(IntentDialog("Nothing found")) } } Now when I type "trail" which matches several trails and thus lets us enter the disambiguation code path, the Shortcut app just displays the dialog title but no disambiguation items to pick from. Is this by design or a bug? (filed as FB17412220)
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Apr ’25