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“Xcode”

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Xcode 26.4: Regressions in Intelligence features
Just installed the new Xcode 26.4 RC build (17E192) after happily using 26.3 for a few months. I'm noticing some immediate regressions in the Intelligence features: Frequent losing of OAuth token (Claude Agent). This had previously been fixed and now is back. Agent Thinking is constrained to thought bubble windows, which are (a) too small to read, (b) not scrollable when thinking goes beyond a few paragraphs. Yes they are tappable when thinking is finished, but this doesn't help. Due to (2), in deep thinking, it's impossible to follow progress beyond the visible window, so impossible to know if the agent is going off the rails. I'm noticing just more general slowness to complete tasks. Not just complete them -- it seems like it takes longer to START tasks, which is really weird. It sits there thinking for longer. Same project, same model as before. Every time you tap New Chat it presents both Claude and Codex choices, even if you're only signed into one. This turned a simple single tap into now a req
Topic: Developer Tools & Services SubTopic: Xcode Tags:
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7h
Are there known issues with aggressive optimization (-O) affecting third-party libraries?
We are encountering an issue in an iOS application where functionality works correctly in Debug builds but fails in Release builds distributed via TestFlight. Details Debug (No Optimization -Onone): Works correctly Release (Optimize for Speed -O): Fails Release with -Onone: Works, but app size nearly doubles Context The issue is related to integration with the Microsoft ONNX runtime library. It appears that the Swift/Clang compiler is aggressively optimizing certain parts of the code in Release builds, possibly removing or altering required logic. Observations The issue started appearing with recent iOS/Xcode updates. No code changes affecting this logic were made recently. Behavior strongly suggests optimization-related side effects. Questions Are there known issues with aggressive optimization (-O) affecting third-party libraries? Are there recommended flags to selectively disable optimization for specific modules or functions? Any tools or diagnostics to identify what is being optimized out? Tempo
Topic: Developer Tools & Services SubTopic: Xcode Tags:
2
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73
8h
Reply to Need MetricKit Implementation details for MacOS background Application, mainly for
Thanks for looking into this. Here is a complete summary of our setup and what we have confirmed so far. App configuration: macOS app distributed via Developer ID (PKG installer) — not the Mac App Store Host app runs as a menu bar agent (LSUIElement = YES in Info.plist) NSApplicationActivationPolicy = .accessory The app runs continuously as a login item — it is always alive Network Extension is a System Extension (NEAppProxyProvider), always running alongside the host app What we have implemented: MXMetricManager.shared().addSubscriber(self) is called in applicationDidFinishLaunching in the host app — as early as possible A separate MXMetricManagerSubscriber is registered inside the Network Extension process at tunnel start Both didReceiveMetricPayloads: and didReceiveDiagnosticPayloads: are implemented On startup we also drain pastPayloads and pastDiagnosticPayloads to catch anything queued while the process was not running The subscriber object is kept alive for the full lifetime of both processes What we h
Topic: Developer Tools & Services SubTopic: General Tags:
5h
App with shallow depth entitlement not appearing in Auto-Launch > When Submerged
I'm building a freediving app for Apple Watch Ultra using the shallow depth entitlement (com.apple.developer.submerged-shallow-depth-and-pressure). My app uses WKExtendedRuntimeSession with the underwater-depth background mode, and it works correctly — the session starts, Water Lock activates automatically, and Crown hold water ejection ends the session as expected. However, the app does not appear in Settings > General > Auto-Launch > When Submerged on the watch. Other third-party apps (including one that hasn't been updated in ~2 years and presumably only has the shallow entitlement) do appear in this list. My configuration: WKBackgroundModes: [underwater-depth, workout-processing] WKSupportsAutomaticDepthLaunch: true (Boolean, in watch app Info.plist) Entitlement verified in both the signed binary and provisioning profile watchOS 26.3, Apple Watch Ultra 2 Tested with: development build, TestFlight, and direct Xcode deploy. Watch restarted after each. The app does not appear in any case. T
Topic: App & System Services SubTopic: Core OS Tags:
2
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48
5h
Xcode now hangs; SDKs are "status unavailable"
My development work is paused as Xcode is now non-functional on my Macs. Loading any project into Xcode soon leads to a hang and Force Quit. The SDKs are listed as status unavailable. No Simulators are available. I've tried previous versions of Xcode; removing everything and re-installing; installation from the Store and direct from the Apple Developer site. I've created a Feedback issue. This happens on both of my Mac minis. I'm running Tahoe 26.4 (25E246) on both.
Topic: Developer Tools & Services SubTopic: Xcode
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232
10h
Clipboard Bug within simulator 26.4
After updating to Xcode 26.4 and also the update on the simulator the copy paste feature in the simulators doesn't work anymore and i can't build my app without it because the user has to copy and paste api keys in it. Is there an solution for it I have tried to install an other simulator ios version but then the simulator doesn't work on the the new xcode. Have someone already found an solution?
Topic: Developer Tools & Services SubTopic: Xcode Tags:
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54
10h
CKQuerySubscription on public database never triggers APNS push in Production environment
Hi everyone, I have a SwiftUI app using CKQuerySubscription on the public database for social notifications (friend requests, recommendations, etc.). Push notifications work perfectly in the Development environment but never fire in Production (TestFlight). Setup: iOS 26.4, Xcode 26, Swift 6 Container: public database, CKQuerySubscription with .firesOnRecordCreation 5 subscriptions verified via CKDatabase.allSubscriptions() registerForRemoteNotifications() called unconditionally on every launch Valid APNS device token received in didRegisterForRemoteNotificationsWithDeviceToken Push Notifications + Background Modes (Remote notifications) capabilities enabled What works: All 5 subscriptions create successfully in Production Records are saved and queryable (in-app CloudKit fetches return them immediately) APNS production push works — tested via Xcode Push Notifications Console with the same device token, notification appeared instantly Everything works perfectly in the Development environment
Topic: App & System Services SubTopic: iCloud & Data Tags:
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558
12h
Xcode 26.4 cannot run app-hosted unit tests on physical iOS 16 devices ("Logic Testing Unavailable")
Summary: After upgrading to Xcode 26.4, app-hosted XCTest execution on physical devices running iOS 16 fails at test-planning time with Logic Testing Unavailable. The same project and same device work under Xcode 26.2. The failure reproduces with a standalone minimal Xcode project, which suggests this is an Xcode regression rather than a project-configuration issue. Environment: Xcode: 26.4 (17E192) macOS: Tahoe 26.4 Failing device: iPhone 11 (iPhone12,1), iOS 16.0.3 Working comparisons: Xcode 26.2 + same iPhone 11 (iOS 16.0.3): works Xcode 26.4 + iPad Pro 11-inch (4th generation) on iOS 26.3: works Regression: Yes. Works on Xcode 26.2. Fails on Xcode 26.4. Same project, same signing setup, same physical iOS 16 device. Minimal reproduction: A minimal sample project with: one iOS app target one app-hosted unit-test target one UI-test target (for comparison; not required to reproduce) Steps for the unit-test repro on a physical dev
Topic: Developer Tools & Services SubTopic: Xcode Tags:
1
0
248
12h
Xcode 26.4: IBOutlets/IBActions gutter circles missing — cannot connect storyboard to code (works in 26.3)
I’m seeing a regression in Xcode 26.4 where Interface Builder will not allow connecting IBOutlets or IBActions. Symptoms: The usual gutter circle/dot does not appear next to IBOutlet / IBAction in the code editor Because of this, I cannot: drag from storyboard → code drag from code → storyboard The class is valid and already connected to the storyboard (existing outlets work) Assistant Editor opens the correct view controller file Important: The exact same project, unchanged, works perfectly in Xcode 26.3. I can create and connect outlets/actions normally there. ⸻ Environment Xcode: 26.4 macOS: 26.4 Mac Mini M4 Pro 64G Ram Project: Objective-C UIKit app using Storyboards This is a long-running, ObjC, project (not newly created) ⸻ What I’ve already tried To rule out the usual suspects: Verified View Controller Custom Class is correctly set in Identity Inspector Verified files are in the correct Target Membership Verified outlets are declared correctly in the .h file: @property (weak,
Topic: Developer Tools & Services SubTopic: Xcode Tags:
8
0
250
14h
Xcode 26.4: Regressions in Intelligence features
Just installed the new Xcode 26.4 RC build (17E192) after happily using 26.3 for a few months. I'm noticing some immediate regressions in the Intelligence features: Frequent losing of OAuth token (Claude Agent). This had previously been fixed and now is back. Agent Thinking is constrained to thought bubble windows, which are (a) too small to read, (b) not scrollable when thinking goes beyond a few paragraphs. Yes they are tappable when thinking is finished, but this doesn't help. Due to (2), in deep thinking, it's impossible to follow progress beyond the visible window, so impossible to know if the agent is going off the rails. I'm noticing just more general slowness to complete tasks. Not just complete them -- it seems like it takes longer to START tasks, which is really weird. It sits there thinking for longer. Same project, same model as before. Every time you tap New Chat it presents both Claude and Codex choices, even if you're only signed into one. This turned a simple single tap into now a req
Topic: Developer Tools & Services SubTopic: Xcode Tags:
Replies
12
Boosts
0
Views
450
Activity
7h
Reply to Xcode 26.4 is missing the documentation for Foundation
Seems to be fixed in Xcode 26.5 beta 1 :)
Topic: Developer Tools & Services SubTopic: Xcode Tags:
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Activity
5h
Are there known issues with aggressive optimization (-O) affecting third-party libraries?
We are encountering an issue in an iOS application where functionality works correctly in Debug builds but fails in Release builds distributed via TestFlight. Details Debug (No Optimization -Onone): Works correctly Release (Optimize for Speed -O): Fails Release with -Onone: Works, but app size nearly doubles Context The issue is related to integration with the Microsoft ONNX runtime library. It appears that the Swift/Clang compiler is aggressively optimizing certain parts of the code in Release builds, possibly removing or altering required logic. Observations The issue started appearing with recent iOS/Xcode updates. No code changes affecting this logic were made recently. Behavior strongly suggests optimization-related side effects. Questions Are there known issues with aggressive optimization (-O) affecting third-party libraries? Are there recommended flags to selectively disable optimization for specific modules or functions? Any tools or diagnostics to identify what is being optimized out? Tempo
Topic: Developer Tools & Services SubTopic: Xcode Tags:
Replies
2
Boosts
0
Views
73
Activity
8h
Reply to Need MetricKit Implementation details for MacOS background Application, mainly for
Thanks for looking into this. Here is a complete summary of our setup and what we have confirmed so far. App configuration: macOS app distributed via Developer ID (PKG installer) — not the Mac App Store Host app runs as a menu bar agent (LSUIElement = YES in Info.plist) NSApplicationActivationPolicy = .accessory The app runs continuously as a login item — it is always alive Network Extension is a System Extension (NEAppProxyProvider), always running alongside the host app What we have implemented: MXMetricManager.shared().addSubscriber(self) is called in applicationDidFinishLaunching in the host app — as early as possible A separate MXMetricManagerSubscriber is registered inside the Network Extension process at tunnel start Both didReceiveMetricPayloads: and didReceiveDiagnosticPayloads: are implemented On startup we also drain pastPayloads and pastDiagnosticPayloads to catch anything queued while the process was not running The subscriber object is kept alive for the full lifetime of both processes What we h
Topic: Developer Tools & Services SubTopic: General Tags:
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Views
Activity
5h
App with shallow depth entitlement not appearing in Auto-Launch > When Submerged
I'm building a freediving app for Apple Watch Ultra using the shallow depth entitlement (com.apple.developer.submerged-shallow-depth-and-pressure). My app uses WKExtendedRuntimeSession with the underwater-depth background mode, and it works correctly — the session starts, Water Lock activates automatically, and Crown hold water ejection ends the session as expected. However, the app does not appear in Settings > General > Auto-Launch > When Submerged on the watch. Other third-party apps (including one that hasn't been updated in ~2 years and presumably only has the shallow entitlement) do appear in this list. My configuration: WKBackgroundModes: [underwater-depth, workout-processing] WKSupportsAutomaticDepthLaunch: true (Boolean, in watch app Info.plist) Entitlement verified in both the signed binary and provisioning profile watchOS 26.3, Apple Watch Ultra 2 Tested with: development build, TestFlight, and direct Xcode deploy. Watch restarted after each. The app does not appear in any case. T
Topic: App & System Services SubTopic: Core OS Tags:
Replies
2
Boosts
0
Views
48
Activity
5h
Xcode now hangs; SDKs are "status unavailable"
My development work is paused as Xcode is now non-functional on my Macs. Loading any project into Xcode soon leads to a hang and Force Quit. The SDKs are listed as status unavailable. No Simulators are available. I've tried previous versions of Xcode; removing everything and re-installing; installation from the Store and direct from the Apple Developer site. I've created a Feedback issue. This happens on both of my Mac minis. I'm running Tahoe 26.4 (25E246) on both.
Topic: Developer Tools & Services SubTopic: Xcode
Replies
13
Boosts
0
Views
232
Activity
10h
Reply to Xcode now hangs; SDKs are "status unavailable"
It suddenly started happening to me on Tahoe 26.4 running Xcode 26.4 on an M2 MacBook Air.
Topic: Developer Tools & Services SubTopic: Xcode
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Activity
10h
Clipboard Bug within simulator 26.4
After updating to Xcode 26.4 and also the update on the simulator the copy paste feature in the simulators doesn't work anymore and i can't build my app without it because the user has to copy and paste api keys in it. Is there an solution for it I have tried to install an other simulator ios version but then the simulator doesn't work on the the new xcode. Have someone already found an solution?
Topic: Developer Tools & Services SubTopic: Xcode Tags:
Replies
1
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0
Views
54
Activity
10h
Reply to App Crash with mxSignpost function not found
Hi, App crashes on launch on iOS 26.3.1 after building with Xcode 26.4. dyld: Symbol not found: MetricKit.mxSignpost Works fine on iOS 26.4+. FB: FB22384135 Anyone else seeing this or any workaround? Thanks.
Topic: App & System Services SubTopic: General Tags:
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11h
Reply to Xcode now hangs; SDKs are "status unavailable"
Just chiming in to say I also am running into this. As my only machine is a 14 M1 Pro I am now out of luck in running Xcode at all for my projects
Topic: Developer Tools & Services SubTopic: Xcode
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Activity
11h
CKQuerySubscription on public database never triggers APNS push in Production environment
Hi everyone, I have a SwiftUI app using CKQuerySubscription on the public database for social notifications (friend requests, recommendations, etc.). Push notifications work perfectly in the Development environment but never fire in Production (TestFlight). Setup: iOS 26.4, Xcode 26, Swift 6 Container: public database, CKQuerySubscription with .firesOnRecordCreation 5 subscriptions verified via CKDatabase.allSubscriptions() registerForRemoteNotifications() called unconditionally on every launch Valid APNS device token received in didRegisterForRemoteNotificationsWithDeviceToken Push Notifications + Background Modes (Remote notifications) capabilities enabled What works: All 5 subscriptions create successfully in Production Records are saved and queryable (in-app CloudKit fetches return them immediately) APNS production push works — tested via Xcode Push Notifications Console with the same device token, notification appeared instantly Everything works perfectly in the Development environment
Topic: App & System Services SubTopic: iCloud & Data Tags:
Replies
9
Boosts
0
Views
558
Activity
12h
Reply to Xcode 26.4 cannot run app-hosted unit tests on physical iOS 16 devices ("Logic Testing Unavailable")
I tested Xcode 26.5 beta 1 (build 17F5012f), released on 2026-03-30, and the issue remains unchanged: app-hosted unit tests still fail on the same physical iOS 16 device with Logic Testing Unavailable.
Topic: Developer Tools & Services SubTopic: Xcode Tags:
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Activity
12h
Xcode 26.4 cannot run app-hosted unit tests on physical iOS 16 devices ("Logic Testing Unavailable")
Summary: After upgrading to Xcode 26.4, app-hosted XCTest execution on physical devices running iOS 16 fails at test-planning time with Logic Testing Unavailable. The same project and same device work under Xcode 26.2. The failure reproduces with a standalone minimal Xcode project, which suggests this is an Xcode regression rather than a project-configuration issue. Environment: Xcode: 26.4 (17E192) macOS: Tahoe 26.4 Failing device: iPhone 11 (iPhone12,1), iOS 16.0.3 Working comparisons: Xcode 26.2 + same iPhone 11 (iOS 16.0.3): works Xcode 26.4 + iPad Pro 11-inch (4th generation) on iOS 26.3: works Regression: Yes. Works on Xcode 26.2. Fails on Xcode 26.4. Same project, same signing setup, same physical iOS 16 device. Minimal reproduction: A minimal sample project with: one iOS app target one app-hosted unit-test target one UI-test target (for comparison; not required to reproduce) Steps for the unit-test repro on a physical dev
Topic: Developer Tools & Services SubTopic: Xcode Tags:
Replies
1
Boosts
0
Views
248
Activity
12h
Reply to App Store Version Not Working on iOS 12
Distribution through the App Store requires a minimum deployment target of iOS 15. You can find this information listed on the Xcode Support webpage.
Topic: App Store Distribution & Marketing SubTopic: General
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Activity
12h
Xcode 26.4: IBOutlets/IBActions gutter circles missing — cannot connect storyboard to code (works in 26.3)
I’m seeing a regression in Xcode 26.4 where Interface Builder will not allow connecting IBOutlets or IBActions. Symptoms: The usual gutter circle/dot does not appear next to IBOutlet / IBAction in the code editor Because of this, I cannot: drag from storyboard → code drag from code → storyboard The class is valid and already connected to the storyboard (existing outlets work) Assistant Editor opens the correct view controller file Important: The exact same project, unchanged, works perfectly in Xcode 26.3. I can create and connect outlets/actions normally there. ⸻ Environment Xcode: 26.4 macOS: 26.4 Mac Mini M4 Pro 64G Ram Project: Objective-C UIKit app using Storyboards This is a long-running, ObjC, project (not newly created) ⸻ What I’ve already tried To rule out the usual suspects: Verified View Controller Custom Class is correctly set in Identity Inspector Verified files are in the correct Target Membership Verified outlets are declared correctly in the .h file: @property (weak,
Topic: Developer Tools & Services SubTopic: Xcode Tags:
Replies
8
Boosts
0
Views
250
Activity
14h