Hello Apple Support Team, We are experiencing a performance issue with HTTP/3 in our iOS application during testing. Problem Description: Network requests using HTTP/3 are significantly slower than expected. This issue occurs on both Wi-Fi and 4G networks, with both IPv4 and IPv6. The same setup worked correctly in an earlier experiment. Key Observations: The slowdown disappears when the device uses: · A personal hotspot. · Network Link Conditioner (with no limitations applied). · Internet sharing from a MacBook via USB (where traffic was also inspected with Wireshark without issues). The problem is specific to HTTP/3 and does not occur with HTTP/2. The issue is reproducible on iOS 15, 18.7, and the latest iOS 26 beta. HTTP/3 is confirmed to be active (via assumeHttp3Capable and Alt-Svc header). Crucially, the same backend endpoint works with normal performance on Android devices and using curl with HTTP/3 support from the same network. I've checked the CFNetwork logs in the Console but haven't found
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When building with the iOS 26 SDK (currently beta 4), the navigation title is often illegible when rendering a Map view. For example, note how the title Choose Location is obscured by the map's text (South America) in the screenshot below: This screenshot is the result of the following view code: import MapKit import SwiftUI struct Demo: View { var body: some View { NavigationStack { Map() .navigationTitle(Text(Choose Location)) .navigationBarTitleDisplayMode(.inline) } } } I tried using the scrollEdgeEffectStyle(_:for:) modifier to apply a scroll edge effect to the top of the screen, in hopes of making the title legible, but that doesn't seem to have any effect. Specifically, the following code seems to produce the exact same result shown in the screenshot above. import MapKit import SwiftUI struct Demo: View { var body: some View { NavigationStack { Map() .scrollEdgeEffectStyle(.hard, for: .top) // ⬅️ no apparent effect .navigationTitle(Text(Choose Location)) .navigationBarTitleDisplayMode(.inline)
Hello, I’m developing an app for both iOS and macOS using Mac Catalyst. On the iOS target, the DeclaredAgeRange framework works fine: I enabled the capability, set the entitlement, and can call the APIs successfully. However, when I build the Mac Catalyst target, I get compile-time errors because DeclaredAgeRange cannot be imported. Environment Xcode 26.0.1 Deployment Target (iOS): 13.0 Mac Catalyst target enabled (same bundle ID, same source code base as iOS version) iOS build works well with DeclaredAgeRange What I tried Added the Declared Age Range capability in Signing & Capabilities for iOS target → works fine. Tried setting Mac Catalyst Deployment Target to macOS 15.0+ and rebuilding → still failed to import. Because it didn’t help, I reverted and removed the separate macOS target setting. On Catalyst, the module simply isn’t available (import DeclaredAgeRange fails). From Apple’s documentation, my understanding is that DeclaredAgeRange should also be supported on Mac Catalyst (SDK
Topic:
App & System Services
SubTopic:
General
Could you share your understanding of the crash and give any hints on how we can fix it? So, let me actually start by commenting on this: At first, we assumed that the issue is with hardware. The first thing to understand here is that DEXTs are FULLY capable of panicking the kernel and probably always will be, particularly PCI DEXTs. The main benefit DEXTs provide is that they DRAMATICALLY improve overall system security and risk by constraining the range of what it's POSSIBLE for a component to do. Your DEXT only has access to a very limited set of kernel data, so that's the ONLY kernel data your DEXT interacts with. It's possible for a network DEXT to disrupt the network stack, but it's very difficult to see how it would disrupt the file system. However, your DEXT is still being given access to many of the same resources it would have access to as a KEXT, and many of those resources are inherently dangerous. In the case of the PCI family, that issue is quite direct— I don't know of any way to build
Topic:
App & System Services
SubTopic:
Drivers
Issue still in iOS 26.0.1 Reproduce with the sample app 'DiffableDataSourceSample' from https://developer.apple.com/documentation/uikit/updating-collection-views-using-diffable-data-sources. It runs with UISplitViewController columns populated when compiled for target iOS 18.2. It comes up empty when target is changed to iOS 26. Both builds run on iPad at iOS 26.0.1 My app was patterned on this sample app and is failing to show content in the same way. FB20611981 submitted
Topic:
UI Frameworks
SubTopic:
UIKit
Tags:
Our project using UISplitViewController as the root view controller for whole app. And when using the xocde26 to build app in iOS26, the layout of page is uncorrect. for iPhone, when launch app and in portrait mode, the app only show a blank page: and when rotate app to landscape, the first view controller of UISplitViewController's viewControllers will float on second view controller: and this float behavior also happens in iPad: below is the demo code: AppDelegate.swift: import UIKit @main class AppDelegate: UIResponder, UIApplicationDelegate { let window: UIWindow = UIWindow() func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool { let vc = SplitViewController(primary: TabBarViewController(), secondary: ViewController()) window.rootViewController = vc window.makeKeyAndVisible() return true } } SplitViewController: import UIKit class SplitViewController: UISplitViewController { init(primary: UIViewController, s
Yeah! It's working! I have a macOS 26.0 host. In UTM I have a macOS 15.7 guest with a Provisioning UUID that has never been added as a device in the developer portal. In my developer account I added a new device with the guest VM's UUID. It's the longer style with lowercase hex digits. I then edited my existing manual provisioning profile with the new device. In Xcode (26.1 beta 2) I changed my app's signing from automatic to manual and referenced the updated provisioning profile. I built the app and copied the new app to a share I use for the VM. I ran the VM and tried to run the updated app. It failed. I missed one step that maybe some others might miss. In Xcode, go to Settings, Apple Accounts. Select your account. Then select your team. Then click on Download Manual Profiles. Once I did that, I rebuilt the app with the now properly updated provisioning profile and recopied the app to the share. And now the app runs in the guest VM! Key steps for those that are not starting from scratch: You need a VM with
Topic:
Code Signing
SubTopic:
Certificates, Identifiers & Profiles
Tags:
You can either press the button, or press the return key on the keyboard. In both cases the keyboard abruptly disappears on both the simulator and iPhone 17 pro. Here's a video from the simulator: https://www.dropbox.com/scl/fi/8qc7is8iqpcjigta71qbq/keyboarddismissal.mov?rlkey=ftgnuoiu4x6mc8qokh5xw22b1&st=bpqb26b8&dl=0 I see others reporting similar issues here: https://github.com/facebook/react-native/issues/53626
Topic:
UI Frameworks
SubTopic:
UIKit
I'm trying to help out one of our vendors by building a skeleton PCI dext which they can flesh out. However, I can't seem to get the signing right. I can't sign it at all using no team or my personal team. Signing for requires a development team, and Personal development teams ... do not support the System Extension capability. I can't sign the driver because DriverKit Team Provisioning Profile: doesn't match the entitlements file's value for the com.apple.developer.driverkit.transport.pci entitlement. I think this problem occurs because our company has already been assigned a transport.pci entitlement, but for our own PCI vendor ID. But I want to build and test software that works with our vendor's PCI device. I tried generating a profile for the driver manually, it contained only our own company's PCI driver match: IOPCIPrimaryMatch = 0x0000MMMM&0x0000FFFF; where MMMM is our own PCI vendor ID. Is there a better way to inspect the profile Xcode is using than the postage-stamped sized in
I was able to test on my own, and in my tests it seems like provisioning profiles now work in the VM. But it took some extra work than just recreating the provisioning profile. My host is on macOS 15.7.1 (24G231). tl;dr try making a brand new VM such that it has a new provisioning UDID and try again My success case was as follows: I had an older clean install VM on macOS 15.7, but it does have the newer provisioning UDID style. I did not add it to my account until just now, however. I manually added the provisioning UDID to my devices list on the developer website. Now, the new device that I just registered on the website has an identifier with lowercase letters (e.g. c28165661eb...) (before, it looks like it automatically set it to uppercase). I recreated the provisioning profile, and built an app using Xcode on my host. I transferred the built app into the VM via a shared folder. I opened the app, and the app extension worked successfully (in my case, my app itself doesn't use a provisioning profile, but it
Topic:
Code Signing
SubTopic:
Certificates, Identifiers & Profiles
Tags:
Using Xcode to build and deploy the app to my watch, this is what I get: “Waiting to reconnect to Apple Watch. Previous preparation error: Transport error. And then “Connecting to Apple Watch. Xcode will continue when the operation completes.” And these messages continue to switch between each other. Sometimes the watch to connect and the application starts, but more often a scenario occurs with endless reconnection. I'm using: MacOS 14.4.1 (MacBook Pro 2019; 1.4 GHz Quad-Core Intel Core i5), Xcode 15.3, Watch OS 10.2 (Apple Watch SE 1), iOS 17.1.1 (iPhone 15 Pro). Methods I tried: Connecting Macbook, iPhone and Watch to the same WIfi network; Disabling Watch (and IPhone) from the Devices and Simulators menu and setting up Watch (and IPhone) from the beginning. Any help?
Hello, I'm using Safari 18.2 on Sonoma 14.6.1. I was using the Developer Tools to do a Local Request Override in the Source tab for a CSS file that had a changing query string. I thought I had a good regular expression to catch all variants, but apparently it was too generic and possibly wrong, and made both Source and Network tabs no longer work in my Safari. The regular expression I entered for the Local Request Override was: //build/style.css(?.*)?$ Now my dev tools is broken to the extent that the Source and Network tabs no longer work. The slide-out panel on Source that shows Breakpoints, LocalOverrides, etc no longer shows. The toggle for it does, but does nothing now. UI in general looks a little wack on both tabs. So, since I can't turn off the Local Request Override, I've been trying to locate where Safari may have stored it to manually delete it. Not having a lot of luck on that front. It seems to me that Safari was unable to escape my regular expression correctly and it then causes additio
In our app we launch landscape only player view controller from portrait only view controller. This is done using present(playerViewController, animated:true) and it is dismissed using dismiss() api. This is working fine till iOS 18 but broken in iOS 26. Now when presenting the presented viewcontrollers UI is realigning / resizing after the view is visible and while dismissing the presenting view controller is realigning after the view is visible. Anyone else seeing it or how to fix this?
Hi Emmanuel, Thank you for your response. I have reviewed the section you pointed out and did some changes. 1.Overriden prefersInterfaceOrientationLocked to return true 2. Implemented didUpdateEffectiveGeometry callback to force the layout After this I am seeing two issues After the presentation and dismiss UI is flickering. Looks like there is some animation happening but not sure what it is. This happens only on device and not observed in simulator. In landscape the safearea position is coming same as portrait. I have uploaded sample project here https://limewire.com/d/n3ioq#sc6PR1GkiG. Can you please have a look and help in fixing this? Steps to reproduce Build and run app in xcode 26 and iOS 26 device Select any row and observe the detail view presentation Select Back button and observe the presented view controller Thanks Harsha
Topic:
UI Frameworks
SubTopic:
UIKit
Tags:
I found a bug when building with Xcode 26.0+. The system incorrectly assumes the TabBar is hidden on app startup, which causes a layout issue until the first device rotation. Workaround: In your target's Build Settings, set Status Bar Initially Hidden to NO. Also note that the UIStatusBarHidden key in your project's Info.plist directly controls the initial status bar visibility.
Topic:
UI Frameworks
SubTopic:
UIKit
Tags: