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Regression / Feature Request: Jumbo Frame (MTU 9000) support missing in AppleUserECM for RTL8156 2.5G USB adapters
Hello, I am currently developing a headless macOS daemon (HarmonBridge) that requires extremely low-latency, high-bandwidth UDP video streaming between a Mac and a Linux host over a dedicated 2.5GbE/5GbE local network link. We are utilizing widely available Realtek RTL8156 / RTL8156B based USB 2.5G network adapters. Under macOS, these adapters default to the generic com.apple.DriverKit.AppleUserECM driver. The hardware itself natively supports Jumbo Frames (MTU 9000), but the DriverKit implementation artificially restricts the MTU cap to 1500 bytes. Because we are forced through MTU 1500, we are incurring significant performance penalties: Excessive IP fragmentation for our large UDP video payloads. Unnecessary CPU overhead due to increased hardware interrupts and header processing at 2.5Gbps speeds. For a latency-critical application like ours, reducing CPU interrupts and utilizing true hardware-level Jumbo Frames is essential. My Questions: Is there an undocumented boot-arg or network sysctl parame
0
0
2
24m
iOS 12.5.8 fails to bootstrap app
Hello, I released a new build for my app but it fails to run on iOS 12.5.8 (tested on iPad Air, iPhone 6, iPhone 5s). The launch storybard is shown, then the app stops abruptly. There is no crash log. It runs fine on iOS 13 or higher. Xcode 26.3 was showing a call stack (something with UIView) that did not include any app code. Now with Xcode 26.4 (and its new command line tools) there is an info popup with a debug metadata dump. However, I don’t intend to focus on Xcode here because it officially does not support iOS 12. It’s ok if I cannot debug, I just want the app to run on the device like the previous build did. Since there is no crash log, and the console is showing a bootstrap error, I believe my app code has not been executed and is therefore not at fault. Build 674 released on 23-Mar-2026: worked fine on iOS 12, built with Xcode 26.3 Build 675 released on 29-Mar-2026: Bootstrap error as described, with both Xcode 26.3 and 26.4 Deployment target = 12.4 Tried Instruments but it fails as soon as I hit r
1
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30
4h
Availability for BLE background scanning on watchOS whilst dimmed
I am trying to find out about the availability of BLE scanning for advertisements when a watchOS app (on watchOS 26.4 with CoreBluetooth) which starts running a HKWorkoutSession becomes dimmed, ie. due to the user lowering their arm. From my understanding there is still availability for ongoing scanning whilst in the dimmed mode. If this is correct, what settings are required (e.g. using background capability for 'Workout Processing', 'bluetooth-central', etc), and does scanning whilst in background mode limit to requiring service uuids in scanForPeripherals? Also if scanning is throttled, is there an 'estimated' inter scan time? Thanks
0
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12
5h
Unable to change build attached to version in App Store Connect
I have an app version (1.2.1) in App Store Connect that is showing Ready for Review status. It has an old build (1.2.0, build 4) attached to it. I uploaded a new build today (1.2.1, build 5) and need to swap it in, but there is no + or - button in the Build section of the version page, and clicking the current build number just navigates to its metadata page. I have tried: Creating a new version (1.2.1) — it auto-populated with the old build Uploading a new build with the correct version string — still no option to swap Looking for a Remove from Review button — it does not exist on my page Is there a way to detach the current build and attach the new one, or do I need to delete the version and start fresh? If so, will that affect my existing review thread with Apple? Any help appreciated.
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12
5h
Unable to change build attached to version in App Store Connect
I have an app version (1.2.1) in App Store Connect that is showing Ready for Review status. It has an old build (1.2.0, build 4) attached to it. I uploaded a new build today (1.2.1, build 5) and need to swap it in, but there is no + or - button in the Build section of the version page, and clicking the current build number just navigates to its metadata page. I have tried: Creating a new version (1.2.1) — it auto-populated with the old build Uploading a new build with the correct version string — still no option to swap Looking for a Remove from Review button — it does not exist on my page Is there a way to detach the current build and attach the new one, or do I need to delete the version and start fresh? If so, will that affect my existing review thread with Apple?v
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7
5h
Reply to Xcode 26.4 rc
@sparkleboss Thank you for this. I see that it has been filed today. Let us route it to the appropriate team for review. We're unable to share any updates on specific reports on the forums. But the team will reach out to you on the Feedback Assistant. For more details on when you'll see updates to your report, please see What to expect after submission. Albert Pascual
  Worldwide Developer Relations.
7h
AlarmKit alerting-phase playback is significantly quieter than equivalent in-app playback using AVAudioSession(.playback)
Hi all, I’m trying to determine whether the loudness gap I’m seeing between AlarmKit alert playback and normal app-managed playback is expected behavior, a sound-asset issue, or something that should be reported as a bug. Observed behavior When an alarm fires through AlarmKit while the device is locked, the alarm sound is significantly quieter than playback of the same or very similar audio once the app is active and using its own audio session. The difference is large enough that it does not feel like a small mastering difference. It feels like the AlarmKit / system alerting path is using a meaningfully lower effective output level than normal app playback. Test scenario My repro is roughly: Schedule an alarm with AlarmKit. Lock the device. Let the alarm fire and listen during the system alerting phase. Enter the app / continue into the app-driven alarm experience. Play the same or equivalent alarm asset via app-managed playback. Result: AlarmKit / lock-screen alerting phase sounds much quieter. In-app playb
0
0
20
7h
Reply to How to recreate Apple Music mini player transition in SwiftUI
Hello @sheikhbayazid This is a great start! While we are unable to share exactly how Apple achieved this in the Music app, you might still find the following helpful: [quote='820932021, sheikhbayazid, /thread/820932, /profile/sheikhbayazid'] Should this be a custom container instead of fullScreenCover? [/quote] You might be looking for a sheet. Users can swipe down to dismiss a sheet interactively by default. .fullScreenCover has no built-in-swipe-to-dismiss, you must provide an explicit mechanism, like a dismiss button. For more information on Sheets see https://developer.apple.com/design/human-interface-guidelines/sheets [quote='820932021, sheikhbayazid, /thread/820932, /profile/sheikhbayazid'] How would you support both new and older iOS versions? [/quote] Configure the Xcode project to support the intended lowest OS version, then use conditionals to handle differences between iOS versions with availability checks such as #available if #available(iOS 18.0, *) { // Content in iOS 18.0 and later } e
Topic: UI Frameworks SubTopic: SwiftUI Tags:
9h
EADemo Not Sending/Recieving Session Packets
Hi, We are currently in the process of getting an custom iAP2 device communicating via USB-C. We have been using the 'EADemo' app as a test app to ensure full function before certification. Currently, the device completes the authentication and identification successfully. The device appears within the 'EADemo' app, and we are able to select it and see the available protocol. Selecting the protocol sends the EAStartSession command to the accessory and we ACK it. This is where the issues begin. Attempting to send either a string or hex packet results in nothing being sent. The app does not appear to attempt to send a packet when these are pressed. The 'EADemo' app also does not increment its receive counter when the accessory sends an EA packet, but we do receive the ACK from the device. This indicates the device is receiving the packet, but not processing it in app. Sending the EASessionStatus from the accessory with a status of okay does not change the behavior. Sending the EASessionStatus
0
0
9
10h
Apple Guideline 5.2.2
I'm unclear on the implications of Apple's App Review Guideline 5.2.2: If your app uses, accesses, monetizes access to, or displays content from a third-party service, ensure that you are specifically permitted to do so under the service’s terms of use. Authorization must be provided upon request. If a paid subscription app uses a licensed search API to retrieve and display links to publicly available third-party web content, is the API license generally enough for compliance? Or does Apple expect separate authorization from each underlying website whose content appears in the search results?
0
0
50
12h
Apple Developer enrollment stuck for a month — passport upload fails immediately in the app
I’m trying to complete my Apple Developer Program enrollment, and I’ve now been stuck in this process for about a month. The main issue is that the passport upload step in the Apple Developer app fails almost immediately every time with the same error, so I can’t complete identity verification and move forward. I’ve already gone through a very long back-and-forth with Apple Developer Support. At first, my enrollment through the website failed, and I was told to continue through the Apple Developer app instead. Then I ran into the passport upload issue in the app. Support asked me to upload identification documents through secure links, and I uploaded the requested documents, including my passport. I also updated my Apple Account name to match my official identification. During this process, one support representative, James, was helping me and there was a lot of back-and-forth. At one point it seemed like the case was being escalated and moving somewhere, but after that the response
0
0
21
13h
`NEProxySettings.matchDomains` / `exceptionList` not working as expected in `NEPacketTunnelProvider` (domain-scoped proxy not applied, and exceptions not bypassed)
I’m working on an iOS Network Extension where a NEPacketTunnelProviderconfigures a local HTTP/HTTPS proxy usingNEPacketTunnelNetworkSettings.proxySettings. Per NEProxySettings.exceptionList docs: If the destination host name of an HTTP connection matches one of these patterns then the proxy settings will not be used for the connection. However, I’m seeing two distinct issues: Issue A (exception bypass not working): HTTPS traffic to a host that matches exceptionList still reaches the proxy. Issue B (domain-scoped proxy not applied): When matchDomains is set to match a specific domain (example: [googlevideo.com]), I still observe its traffic in some apps is not proxied. If I remove the domain from matchDomains, the same traffic is proxied. Environment OS: iOS (reproduced with 26.4 and other versions) Devices: Reproduced with several iPhones (likely iPads as well) Xcode: 26.3 Extension: NEPacketTunnelProvider Minimal Repro (code) This is the minimal configuration. Toggle between CONFIG A / CONFIG B to reproduce
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13h
Regression / Feature Request: Jumbo Frame (MTU 9000) support missing in AppleUserECM for RTL8156 2.5G USB adapters
Hello, I am currently developing a headless macOS daemon (HarmonBridge) that requires extremely low-latency, high-bandwidth UDP video streaming between a Mac and a Linux host over a dedicated 2.5GbE/5GbE local network link. We are utilizing widely available Realtek RTL8156 / RTL8156B based USB 2.5G network adapters. Under macOS, these adapters default to the generic com.apple.DriverKit.AppleUserECM driver. The hardware itself natively supports Jumbo Frames (MTU 9000), but the DriverKit implementation artificially restricts the MTU cap to 1500 bytes. Because we are forced through MTU 1500, we are incurring significant performance penalties: Excessive IP fragmentation for our large UDP video payloads. Unnecessary CPU overhead due to increased hardware interrupts and header processing at 2.5Gbps speeds. For a latency-critical application like ours, reducing CPU interrupts and utilizing true hardware-level Jumbo Frames is essential. My Questions: Is there an undocumented boot-arg or network sysctl parame
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0
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0
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2
Activity
24m
Individual to Organization Developer Account
Hello, I submitted a request to update my individual developer account to organization over 2 weeks ago and still have not received any response. Any advice on how to expedite this process?
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0
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0
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4
Activity
1h
Reply to Core Spotlight Semantic Search - still non-functional for 1+ year after WWDC24?
Found it guys… First, the pattern is reversed: disableSemanticSearch = True (default) is semantic search ON… Second finding… despite prepare() it doesn't ensure that you don't get the error. Adding a dummy first request gets the error, and the following requests work (with correct results)
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Activity
3h
iOS 12.5.8 fails to bootstrap app
Hello, I released a new build for my app but it fails to run on iOS 12.5.8 (tested on iPad Air, iPhone 6, iPhone 5s). The launch storybard is shown, then the app stops abruptly. There is no crash log. It runs fine on iOS 13 or higher. Xcode 26.3 was showing a call stack (something with UIView) that did not include any app code. Now with Xcode 26.4 (and its new command line tools) there is an info popup with a debug metadata dump. However, I don’t intend to focus on Xcode here because it officially does not support iOS 12. It’s ok if I cannot debug, I just want the app to run on the device like the previous build did. Since there is no crash log, and the console is showing a bootstrap error, I believe my app code has not been executed and is therefore not at fault. Build 674 released on 23-Mar-2026: worked fine on iOS 12, built with Xcode 26.3 Build 675 released on 29-Mar-2026: Bootstrap error as described, with both Xcode 26.3 and 26.4 Deployment target = 12.4 Tried Instruments but it fails as soon as I hit r
Replies
1
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0
Views
30
Activity
4h
Availability for BLE background scanning on watchOS whilst dimmed
I am trying to find out about the availability of BLE scanning for advertisements when a watchOS app (on watchOS 26.4 with CoreBluetooth) which starts running a HKWorkoutSession becomes dimmed, ie. due to the user lowering their arm. From my understanding there is still availability for ongoing scanning whilst in the dimmed mode. If this is correct, what settings are required (e.g. using background capability for 'Workout Processing', 'bluetooth-central', etc), and does scanning whilst in background mode limit to requiring service uuids in scanForPeripherals? Also if scanning is throttled, is there an 'estimated' inter scan time? Thanks
Replies
0
Boosts
0
Views
12
Activity
5h
Unable to change build attached to version in App Store Connect
I have an app version (1.2.1) in App Store Connect that is showing Ready for Review status. It has an old build (1.2.0, build 4) attached to it. I uploaded a new build today (1.2.1, build 5) and need to swap it in, but there is no + or - button in the Build section of the version page, and clicking the current build number just navigates to its metadata page. I have tried: Creating a new version (1.2.1) — it auto-populated with the old build Uploading a new build with the correct version string — still no option to swap Looking for a Remove from Review button — it does not exist on my page Is there a way to detach the current build and attach the new one, or do I need to delete the version and start fresh? If so, will that affect my existing review thread with Apple? Any help appreciated.
Replies
0
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0
Views
12
Activity
5h
Unable to change build attached to version in App Store Connect
I have an app version (1.2.1) in App Store Connect that is showing Ready for Review status. It has an old build (1.2.0, build 4) attached to it. I uploaded a new build today (1.2.1, build 5) and need to swap it in, but there is no + or - button in the Build section of the version page, and clicking the current build number just navigates to its metadata page. I have tried: Creating a new version (1.2.1) — it auto-populated with the old build Uploading a new build with the correct version string — still no option to swap Looking for a Remove from Review button — it does not exist on my page Is there a way to detach the current build and attach the new one, or do I need to delete the version and start fresh? If so, will that affect my existing review thread with Apple?v
Replies
0
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0
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7
Activity
5h
Reply to App Store Connect crashes when configuring App Clip default experience (appClipDefaultExperience undefined)
@azdzadazsqsx Thanks for this, We're unable to share any updates on specific reports on the forums, however I would encourage you to try the new 26.5 beta and let me know if that build fixes your issue. Let me know! Albert Pascual
  Worldwide Developer Relations.
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7h
Reply to Xcode 26.4 rc
@sparkleboss Thank you for this. I see that it has been filed today. Let us route it to the appropriate team for review. We're unable to share any updates on specific reports on the forums. But the team will reach out to you on the Feedback Assistant. For more details on when you'll see updates to your report, please see What to expect after submission. Albert Pascual
  Worldwide Developer Relations.
Replies
Boosts
Views
Activity
7h
AlarmKit alerting-phase playback is significantly quieter than equivalent in-app playback using AVAudioSession(.playback)
Hi all, I’m trying to determine whether the loudness gap I’m seeing between AlarmKit alert playback and normal app-managed playback is expected behavior, a sound-asset issue, or something that should be reported as a bug. Observed behavior When an alarm fires through AlarmKit while the device is locked, the alarm sound is significantly quieter than playback of the same or very similar audio once the app is active and using its own audio session. The difference is large enough that it does not feel like a small mastering difference. It feels like the AlarmKit / system alerting path is using a meaningfully lower effective output level than normal app playback. Test scenario My repro is roughly: Schedule an alarm with AlarmKit. Lock the device. Let the alarm fire and listen during the system alerting phase. Enter the app / continue into the app-driven alarm experience. Play the same or equivalent alarm asset via app-managed playback. Result: AlarmKit / lock-screen alerting phase sounds much quieter. In-app playb
Replies
0
Boosts
0
Views
20
Activity
7h
Reply to How to recreate Apple Music mini player transition in SwiftUI
Hello @sheikhbayazid This is a great start! While we are unable to share exactly how Apple achieved this in the Music app, you might still find the following helpful: [quote='820932021, sheikhbayazid, /thread/820932, /profile/sheikhbayazid'] Should this be a custom container instead of fullScreenCover? [/quote] You might be looking for a sheet. Users can swipe down to dismiss a sheet interactively by default. .fullScreenCover has no built-in-swipe-to-dismiss, you must provide an explicit mechanism, like a dismiss button. For more information on Sheets see https://developer.apple.com/design/human-interface-guidelines/sheets [quote='820932021, sheikhbayazid, /thread/820932, /profile/sheikhbayazid'] How would you support both new and older iOS versions? [/quote] Configure the Xcode project to support the intended lowest OS version, then use conditionals to handle differences between iOS versions with availability checks such as #available if #available(iOS 18.0, *) { // Content in iOS 18.0 and later } e
Topic: UI Frameworks SubTopic: SwiftUI Tags:
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Activity
9h
EADemo Not Sending/Recieving Session Packets
Hi, We are currently in the process of getting an custom iAP2 device communicating via USB-C. We have been using the 'EADemo' app as a test app to ensure full function before certification. Currently, the device completes the authentication and identification successfully. The device appears within the 'EADemo' app, and we are able to select it and see the available protocol. Selecting the protocol sends the EAStartSession command to the accessory and we ACK it. This is where the issues begin. Attempting to send either a string or hex packet results in nothing being sent. The app does not appear to attempt to send a packet when these are pressed. The 'EADemo' app also does not increment its receive counter when the accessory sends an EA packet, but we do receive the ACK from the device. This indicates the device is receiving the packet, but not processing it in app. Sending the EASessionStatus from the accessory with a status of okay does not change the behavior. Sending the EASessionStatus
Replies
0
Boosts
0
Views
9
Activity
10h
Apple Guideline 5.2.2
I'm unclear on the implications of Apple's App Review Guideline 5.2.2: If your app uses, accesses, monetizes access to, or displays content from a third-party service, ensure that you are specifically permitted to do so under the service’s terms of use. Authorization must be provided upon request. If a paid subscription app uses a licensed search API to retrieve and display links to publicly available third-party web content, is the API license generally enough for compliance? Or does Apple expect separate authorization from each underlying website whose content appears in the search results?
Replies
0
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0
Views
50
Activity
12h
Apple Developer enrollment stuck for a month — passport upload fails immediately in the app
I’m trying to complete my Apple Developer Program enrollment, and I’ve now been stuck in this process for about a month. The main issue is that the passport upload step in the Apple Developer app fails almost immediately every time with the same error, so I can’t complete identity verification and move forward. I’ve already gone through a very long back-and-forth with Apple Developer Support. At first, my enrollment through the website failed, and I was told to continue through the Apple Developer app instead. Then I ran into the passport upload issue in the app. Support asked me to upload identification documents through secure links, and I uploaded the requested documents, including my passport. I also updated my Apple Account name to match my official identification. During this process, one support representative, James, was helping me and there was a lot of back-and-forth. At one point it seemed like the case was being escalated and moving somewhere, but after that the response
Replies
0
Boosts
0
Views
21
Activity
13h
`NEProxySettings.matchDomains` / `exceptionList` not working as expected in `NEPacketTunnelProvider` (domain-scoped proxy not applied, and exceptions not bypassed)
I’m working on an iOS Network Extension where a NEPacketTunnelProviderconfigures a local HTTP/HTTPS proxy usingNEPacketTunnelNetworkSettings.proxySettings. Per NEProxySettings.exceptionList docs: If the destination host name of an HTTP connection matches one of these patterns then the proxy settings will not be used for the connection. However, I’m seeing two distinct issues: Issue A (exception bypass not working): HTTPS traffic to a host that matches exceptionList still reaches the proxy. Issue B (domain-scoped proxy not applied): When matchDomains is set to match a specific domain (example: [googlevideo.com]), I still observe its traffic in some apps is not proxied. If I remove the domain from matchDomains, the same traffic is proxied. Environment OS: iOS (reproduced with 26.4 and other versions) Devices: Reproduced with several iPhones (likely iPads as well) Xcode: 26.3 Extension: NEPacketTunnelProvider Minimal Repro (code) This is the minimal configuration. Toggle between CONFIG A / CONFIG B to reproduce
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0
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0
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24
Activity
13h