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Device Hub: Can't switch keyboard input language with a physical keyboard
Hi, I can't switch between Korean and English input with my Mac's physical keyboard in Device Hub. The globe button on the software keyboard switches fine. Simulate Hardware Keyboard is on. I tried Ctrl+Space and Caps Lock. Nothing changes the language in the simulator. Xcode 27.1 beta, Device Hub 27.1 beta. Anyone else seeing this or know a workaround?
1
3
431
Oct ’26
Xcode 27: CLLocationManager kCLErrorDomain Code=5
Dear Apple Developer Community, Our app monitors a user-defined region by using startMonitoring on an instance of CLLocationManager. While it works as intended on a real device, starting with Xcode 27, this method invocation always results in >locationManager ... monitoringDidFailFor< being called. The error code is always kCLErrorDomain Code=5 but this only occurs within iOS 27 simulators. It works perfectly in iOS 26 simulators. Additionally, CLLocationManager.isMonitoringAvailable(for: CLCircularRegion.self) always returns false on these iOS 27 simulators. This issue blocks parts of our automated system tests. Is it a bug or on purpose? Thank you in advance.
1
1
555
Oct ’26
FYI: Xcode and Disk Space
I discovered a disk space issue with Xcode on my 1TB hard disk. Xcode doesn’t delete old or unused Simulators, causing them to mix and consume valuable space. Deleting them from the Window > Devices & Simulators menu didn’t work, so I used Disk Utility to find and delete them. However, they persisted. To regain disk space, I completely removed Xcode and the Developer Folder. After reinstalling Xcode, I regained about 80% of my disk space. Despite unmounting the Simulators, they remained. For those unable or unwilling to do this, the Mac App Store offers DevCleaner, a utility that removes old Xcode Cache and Simulators. Thanks. I hope I've helped someone else. Dan Uff
4
0
1.3k
Oct ’26
Declared Age Range API availability on iOS versions below iOS 26
Hello team, We are currently evaluating the Declared Age Range API for supporting age-related regulatory requirements in our application, and we would appreciate some clarification regarding iOS version compatibility. Based on the documentation, we understand that newer age-related capabilities such as isEligibleForAgeFeatures and Regulatory Features are available only on newer iOS versions (for example, iOS 26.4+). We would like to clarify the following: Is the Declared Age Range API itself available only on iOS 26+ devices, or can age range information also be retrieved on earlier iOS versions? For users running iOS versions below 26, will the Declared Age Range API: Return age range information? Return a limited response? Be completely unavailable? Is our understanding correct that applications running on iOS versions earlier than iOS 26 cannot obtain age range information through the Declared Age Range API and therefore cannot determine whether age-related regulatory requirements apply? Are there any recommended fallback approaches for supporting age-verification or age-assurance requirements on devices running iOS versions below 26? Has anyone successfully implemented a solution that provides equivalent age-related signals or regulatory age-verification handling for users on earlier iOS versions? If so, are there any best practices or recommended approaches? Any clarification or guidance would be greatly appreciated. Thanks!
1
0
144
Oct ’26
XCode 27: no build destinations, empty destination dropdown
Since upgrading to XCode 27, I can no longer select or install build destinations, and my own devices also no longer show up in the lists. The destinations dropdown is completely empty. The device hub shows some installed simulators, but I can't select them as build destinations, which means I can not build or compile anything. Even the usualy generic iOS or MacOS device destinations are absent, meaning I essentially can't work on projects.
0
1
97
Oct ’26
Paired Apple Watch never appears in Xcode Devices & Simulators, Developer Mode toggle missing on watchOS
I'm blocked trying to run/debug an app on a physical Apple Watch. The iPhone connects to Xcode perfectly over USB and is fully trusted, but the paired Watch never shows up in Xcode, and because of that the Developer Mode toggle never appears on the watch itself. Environment Mac: MacOS 26.4 Xcode: 26.5 iPhone: iPhone 17, iOS 26.4 — connected to Mac via USB, trusted Apple Watch: Ultra 3, watchOS 26.3 Developer Mode: enabled on iPhone Watch is paired and working normally in the iPhone Watch app What happens In Xcode → Window → Devices and Simulators, only the iPhone ("Brian") shows under Connected, with its installed apps listed correctly. The paired Apple Watch does not appear under it or as a separate entry. On the watch, Settings → Privacy & Security has no Developer Mode item. I understand this only surfaces after Xcode successfully connects to the watch, so I believe the missing Xcode connection is the root cause. When I first connected the iPhone via cable, a Trust prompt did appear on the watch and I accepted it. What I've already tried Enabled Developer Mode on iPhone (toggled off/on, with restarts) Connected iPhone via USB and confirmed Trust on both iPhone and watch Restarted Mac, iPhone, and watch multiple times Confirmed Bluetooth and Wi-Fi are on across all three devices Kept the watch unlocked and on my wrist, close to the iPhone and Mac Despite this, the watch never appears in Xcode and the Developer Mode toggle never surfaces on watchOS. Questions Is this the known Xcode 26 / watchOS 26 tunneling/discovery regression, or is something else going on in my setup? Is there an Apple-supported way to force Xcode to re-discover a paired watch without unpairing it from the iPhone? Has any specific combination of macOS / Xcode / watchOS versions reliably resolved this for anyone? Any guidance appreciated. Happy to file a Feedback Assistant report and share the ID if useful.
2
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835
Oct ’26
Permission denied - Attempting to run Docker from XCTestCase
I'm setting up tests for my Xcode Multiplatform App. To create a test environment I created a docker image that I want to run an XCTestCase against. I understand I'd have to make sure Docker is running before running the test. That said I have a permission denied when trying to connect to the docker daemon socket. Background: I'm using a makefile to store the commands and planned to run the docker build and docker run commands in the setUpWithError while running the docker kill command in tearDownWithError. To run the commands I used Process to execute the shell commands. I'm currently doing this is a test function to get it up and going. Issue: When I try to run the docker command Xcode tells me that it doesn't give me the permission to run it: docker: Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post "http://%2Fvar%2Frun%2Fdocker.sock/v1.24/containers/create?name=remarkable": dial unix /var/run/docker.sock: connect: operation not permitted. See 'docker run --help'. I only want to use Docker to run this specific XCTestCase. Is there anyway to run it from here JUST for the test? Or do I need to manually run docker and kill it before/after I run these tests? Thanks for any help.
1
0
1.7k
Oct ’26
Xcode is not supported by this device
Hi, When I run a build and select my iPhone, I get this error: "The capability “Fetch Extended Device Info” is not supported by this device." Although it works correctly when I run the build on the Simulator on my Mac. I recently updated my iPhone to iOS 27.2. Could this be the problem? Is there any way to fix it, or should I wait for an Xcode update? I tried running it in version Xcode 26.5 and 27Beta Thanks!
0
0
290
Sep ’26
Request: Option to Position Coding Assistant on the Right Side in Xcode
Dear Xcode Team, Please consider adding an option to position the Coding Assistant on the right side of the editor. Currently, when the assistant panel is open, it makes it difficult to access the Project Navigator at the same time. Having the ability to move the Coding Assistant to the right side would allow developers to keep the Project Navigator visible while interacting with the assistant, improving workflow and efficiency. Thank you
2
4
292
Sep ’26
[Feature request] Xcode 27 Easier Previewing while using coding agent
Filed a feature request in feedback assistant, but starting a discussion here as well since I'm probably not the only one. The issue I have is that coding assistant and previews seem to be mutually exclusive. That means that when I'm iterating on UI, I either have to rely on the coding assistant showing me preview screenshots (cannot interact), firing up Device Hub (have to manually kick off a build after each change) or manually opening the associated preview (requires a lot of hoping back and forth). This feels inefficient and means I have to hop around and manage my windows and tabs more. A slight work around is to open a split view with the file and preview there. This layout is inefficient and clunky. I would love if Xcode supported a pinned preview next to coding assistant (or automatically showed the relevant one). I imagine this working just like showing a preview next to a file cmd + opt + return hides/shows the preview. FB23219611
4
1
889
Sep ’26
Strange Run Icon in Xcode 27
All my Xcode 27 versions (including Xcode 27.2. beta 2) have this strange Build & Run icon with a line through it. What does it mean and how can i change it? Screenshots of Xcode 27 in the App Store and the WWDC 27 videos show the normal triangle and no slash. Does anyone else see this on their Xcode 27? I works without problems, everything is normal, just this strange slash bothers me. Update: The official 27.1 release version has the normal triangle. It looks like this is for beta versions?
5
0
223
Sep ’26
SwiftUI Preview crash in Xcode 27 / iOS 27 simulator — segfault in libobjc map_images inside XCPreviewAgent's JIT-compiled preview binary (works with "Use Legacy Preview Execution")
Environment: Xcode 27 (macOS 27.0, build 26A428) iOS 27.0 simulator (build 24A434), tested on iPhone 18 Pro CoreSimulator 1174.9.2 Large app target: dozens of linked frameworks (first-party SPM modules plus several third-party SDKs) it occurred on xcode 26 also Description: SwiftUI canvas previews consistently crash XCPreviewAgent with EXC_BAD_ACCESS / SIGSEGV when rendering previews for a fairly large app target, across multiple different SwiftUI views (not tied to one specific file's code). Workaround found: the crash does not occur when "Use Legacy Preview Execution" is enabled (Xcode's preview settings). With the default (non-legacy, JIT-based) preview execution path, it crashes reliably; switching to legacy execution, previews render normally. Possible contributing factor — project size / timing: we suspect the size of the project may also be a factor, independent of the crash itself. The new (non-legacy) execution path recompiles/JITs the app for the canvas on every preview, and for a target this large that process takes noticeably longer than it does under legacy execution. It's plausible that on top of the crash described below, the new path is also more prone to timing out or failing under load on larger projects, simply because there's more to JIT-compile and load within whatever time budget the preview agent allows. We can't fully separate "crashes because of X" from "runs out of time because of project size" from the crash logs alone, but both seem worth flagging since they may share the same root cause in the new execution path's handling of larger binaries. Crash signature #1 (default preview execution, first attempts): Crashing Thread: 0 libswiftCore.dylib swift_conformsToProtocolMaybeInstantiateSuperclasses(...) 1 libswiftCore.dylib swift_conformsToProtocolWithExecutionContext 2 libswiftCore.dylib swift::_conformsToProtocol(...) 3 libswiftCore.dylib swift::_checkGenericRequirements(...) Termination: SIGSEGV / Segmentation fault: 11 Crash signature #2 (default preview execution, after removing an unrelated third-party SDK dependency from the previewed module, to rule it out as a cause): Crashing Thread ("com.apple.xojit_executor.wrapper_functions"): 0 libobjc.A.dylib readClass(objc_class*, bool, bool) 1 libobjc.A.dylib map_images_nolock 2 libobjc.A.dylib map_images 3 libobjc.A.dylib _objc_map_images 4-7 <unsymbolicated / anonymous image, source="A" (Absent) in the crash report> Exception: EXC_BAD_ACCESS (SIGSEGV), KERN_INVALID_ADDRESS In the second case, the crash log's usedImages list shows the frames above the objc runtime resolving to an image with no path, no resolvable UUID, and "source": "A" — this appears to be the dynamically JIT-compiled preview binary that XOJITExecutor builds and hot-loads for the canvas (rather than a normal on-disk framework), and the crash occurs while the Objective-C runtime is registering classes from it during _objc_map_images. What we've ruled out: Not caused by the specific SwiftUI view being previewed — reproduces across multiple unrelated views in the same target. Not caused by a specific third-party SDK: we removed a heavyweight closed-source analytics SDK dependency from the previewed module entirely (confirmed via successful xcodebuild build with zero references left), and the crash still occurred with an equivalent signature under default preview execution. Confirmed via symbolicated .ips crash reports in ~/Library/Logs/DiagnosticReports/XCPreviewAgent-*.ips that the crashing frames are inside Apple's own preview infrastructure (libobjc.A.dylib, libswiftCore.dylib, XOJITExecutor), not in application or third-party framework code. Confirmed the failure is specific to the new (non-legacy) preview execution path: enabling "Use Legacy Preview Execution" eliminates the crash entirely, with no other changes. Question for the community: Has anyone else seen SwiftUI Previews crash with a libobjc/map_images or swift_conformsToProtocol* segfault specifically on Xcode 27 / iOS 27 simulator with the new (non-legacy) preview execution path, for apps with a large number of linked frameworks? Does project size/build time make the new execution path more likely to fail or time out for anyone else? Is "Use Legacy Preview Execution" the recommended workaround until this is fixed, or should this be filed separately as Feedback?
3
1
559
Sep ’26
StoreKit testing not working on iOS26.5 simulator
Hi, I'm trying to run our StoreKit unit tests with Xcode26.5 on an iOS26.5 simulator. Host computer has macOS26.5. All tests are failing and in the console I see logs such as [SKTestSession] Error saving configuration file: Error Domain=SKInternalErrorDomain Code=3 "(null)" [SKTestSession] Error deleting all transactions: Error Domain=SKInternalErrorDomain Code=3 "(null)" [SKTestSession] Error clearing overrides: Error Domain=SKInternalErrorDomain Code=3 "(null)" [SKTestSession] Error setting value to 1 for identifier 2 for jp.unext.mediaplayer: Error Domain=SKInternalErrorDomain Code=3 "(null)" And the simulator asks me to provide my AppleID. Tests have been broken since at least 26.4 The release notes claims that it has been fixed but not for me. https://developer.apple.com/documentation/ios-ipados-release-notes/ios-ipados-26_5-release-notes#StoreKit-Testing-in-Xcode Does anyone else have the same issue? Reported FB22774836 just in case.
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11
1.7k
Sep ’26
Xcode 27.1.0 Beta - Device Hub does not accept unsigned .app bundle drops
In previous versions of Simulator.app, you could drag an unsigned iOS .app bundle onto the Simulator screen to install it. This was useful functionality to allow for more easy distribution of simulator-only builds within a team without needing to worry about signing and distribution. This functionality appears to have been completely removed in Device Hub which is a shame.
1
0
251
Sep ’26
Device Hub Lacking External Display Option
Since the XCode 27 came out with the device hub, I can't found the option "External Display"! This is outrageous, since I have an app that only works with a external display connected! This menu existed on the menu bar of the simulators, but since the simulators was replaced by the device hub, I can't debug or test my app anymore!
4
3
298
Sep ’26
Device Hub: Can't switch keyboard input language with a physical keyboard
Hi, I can't switch between Korean and English input with my Mac's physical keyboard in Device Hub. The globe button on the software keyboard switches fine. Simulate Hardware Keyboard is on. I tried Ctrl+Space and Caps Lock. Nothing changes the language in the simulator. Xcode 27.1 beta, Device Hub 27.1 beta. Anyone else seeing this or know a workaround?
Replies
1
Boosts
3
Views
431
Activity
Oct ’26
Xcode 27: CLLocationManager kCLErrorDomain Code=5
Dear Apple Developer Community, Our app monitors a user-defined region by using startMonitoring on an instance of CLLocationManager. While it works as intended on a real device, starting with Xcode 27, this method invocation always results in >locationManager ... monitoringDidFailFor< being called. The error code is always kCLErrorDomain Code=5 but this only occurs within iOS 27 simulators. It works perfectly in iOS 26 simulators. Additionally, CLLocationManager.isMonitoringAvailable(for: CLCircularRegion.self) always returns false on these iOS 27 simulators. This issue blocks parts of our automated system tests. Is it a bug or on purpose? Thank you in advance.
Replies
1
Boosts
1
Views
555
Activity
Oct ’26
FYI: Xcode and Disk Space
I discovered a disk space issue with Xcode on my 1TB hard disk. Xcode doesn’t delete old or unused Simulators, causing them to mix and consume valuable space. Deleting them from the Window > Devices & Simulators menu didn’t work, so I used Disk Utility to find and delete them. However, they persisted. To regain disk space, I completely removed Xcode and the Developer Folder. After reinstalling Xcode, I regained about 80% of my disk space. Despite unmounting the Simulators, they remained. For those unable or unwilling to do this, the Mac App Store offers DevCleaner, a utility that removes old Xcode Cache and Simulators. Thanks. I hope I've helped someone else. Dan Uff
Replies
4
Boosts
0
Views
1.3k
Activity
Oct ’26
Logs from NetworkExtensions are absent in the Xcode console
Hello, It seems that starting Xcode 27, the logs from NetworkExtensions do not show up in the Xcode Console anymore. They still show in Console.app somehow. I have filed a bug report (FB24985332) about it, if you encounter the same issue, please upvote this so that the NetworkExtension team can fix this faster, thanks !
Replies
2
Boosts
3
Views
544
Activity
Oct ’26
Declared Age Range API availability on iOS versions below iOS 26
Hello team, We are currently evaluating the Declared Age Range API for supporting age-related regulatory requirements in our application, and we would appreciate some clarification regarding iOS version compatibility. Based on the documentation, we understand that newer age-related capabilities such as isEligibleForAgeFeatures and Regulatory Features are available only on newer iOS versions (for example, iOS 26.4+). We would like to clarify the following: Is the Declared Age Range API itself available only on iOS 26+ devices, or can age range information also be retrieved on earlier iOS versions? For users running iOS versions below 26, will the Declared Age Range API: Return age range information? Return a limited response? Be completely unavailable? Is our understanding correct that applications running on iOS versions earlier than iOS 26 cannot obtain age range information through the Declared Age Range API and therefore cannot determine whether age-related regulatory requirements apply? Are there any recommended fallback approaches for supporting age-verification or age-assurance requirements on devices running iOS versions below 26? Has anyone successfully implemented a solution that provides equivalent age-related signals or regulatory age-verification handling for users on earlier iOS versions? If so, are there any best practices or recommended approaches? Any clarification or guidance would be greatly appreciated. Thanks!
Replies
1
Boosts
0
Views
144
Activity
Oct ’26
XCode 27: no build destinations, empty destination dropdown
Since upgrading to XCode 27, I can no longer select or install build destinations, and my own devices also no longer show up in the lists. The destinations dropdown is completely empty. The device hub shows some installed simulators, but I can't select them as build destinations, which means I can not build or compile anything. Even the usualy generic iOS or MacOS device destinations are absent, meaning I essentially can't work on projects.
Replies
0
Boosts
1
Views
97
Activity
Oct ’26
Paired Apple Watch never appears in Xcode Devices & Simulators, Developer Mode toggle missing on watchOS
I'm blocked trying to run/debug an app on a physical Apple Watch. The iPhone connects to Xcode perfectly over USB and is fully trusted, but the paired Watch never shows up in Xcode, and because of that the Developer Mode toggle never appears on the watch itself. Environment Mac: MacOS 26.4 Xcode: 26.5 iPhone: iPhone 17, iOS 26.4 — connected to Mac via USB, trusted Apple Watch: Ultra 3, watchOS 26.3 Developer Mode: enabled on iPhone Watch is paired and working normally in the iPhone Watch app What happens In Xcode → Window → Devices and Simulators, only the iPhone ("Brian") shows under Connected, with its installed apps listed correctly. The paired Apple Watch does not appear under it or as a separate entry. On the watch, Settings → Privacy & Security has no Developer Mode item. I understand this only surfaces after Xcode successfully connects to the watch, so I believe the missing Xcode connection is the root cause. When I first connected the iPhone via cable, a Trust prompt did appear on the watch and I accepted it. What I've already tried Enabled Developer Mode on iPhone (toggled off/on, with restarts) Connected iPhone via USB and confirmed Trust on both iPhone and watch Restarted Mac, iPhone, and watch multiple times Confirmed Bluetooth and Wi-Fi are on across all three devices Kept the watch unlocked and on my wrist, close to the iPhone and Mac Despite this, the watch never appears in Xcode and the Developer Mode toggle never surfaces on watchOS. Questions Is this the known Xcode 26 / watchOS 26 tunneling/discovery regression, or is something else going on in my setup? Is there an Apple-supported way to force Xcode to re-discover a paired watch without unpairing it from the iPhone? Has any specific combination of macOS / Xcode / watchOS versions reliably resolved this for anyone? Any guidance appreciated. Happy to file a Feedback Assistant report and share the ID if useful.
Replies
2
Boosts
0
Views
835
Activity
Oct ’26
Permission denied - Attempting to run Docker from XCTestCase
I'm setting up tests for my Xcode Multiplatform App. To create a test environment I created a docker image that I want to run an XCTestCase against. I understand I'd have to make sure Docker is running before running the test. That said I have a permission denied when trying to connect to the docker daemon socket. Background: I'm using a makefile to store the commands and planned to run the docker build and docker run commands in the setUpWithError while running the docker kill command in tearDownWithError. To run the commands I used Process to execute the shell commands. I'm currently doing this is a test function to get it up and going. Issue: When I try to run the docker command Xcode tells me that it doesn't give me the permission to run it: docker: Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post "http://%2Fvar%2Frun%2Fdocker.sock/v1.24/containers/create?name=remarkable": dial unix /var/run/docker.sock: connect: operation not permitted. See 'docker run --help'. I only want to use Docker to run this specific XCTestCase. Is there anyway to run it from here JUST for the test? Or do I need to manually run docker and kill it before/after I run these tests? Thanks for any help.
Replies
1
Boosts
0
Views
1.7k
Activity
Oct ’26
Xcode is not supported by this device
Hi, When I run a build and select my iPhone, I get this error: "The capability “Fetch Extended Device Info” is not supported by this device." Although it works correctly when I run the build on the Simulator on my Mac. I recently updated my iPhone to iOS 27.2. Could this be the problem? Is there any way to fix it, or should I wait for an Xcode update? I tried running it in version Xcode 26.5 and 27Beta Thanks!
Replies
0
Boosts
0
Views
290
Activity
Sep ’26
Request: Option to Position Coding Assistant on the Right Side in Xcode
Dear Xcode Team, Please consider adding an option to position the Coding Assistant on the right side of the editor. Currently, when the assistant panel is open, it makes it difficult to access the Project Navigator at the same time. Having the ability to move the Coding Assistant to the right side would allow developers to keep the Project Navigator visible while interacting with the assistant, improving workflow and efficiency. Thank you
Replies
2
Boosts
4
Views
292
Activity
Sep ’26
[Feature request] Xcode 27 Easier Previewing while using coding agent
Filed a feature request in feedback assistant, but starting a discussion here as well since I'm probably not the only one. The issue I have is that coding assistant and previews seem to be mutually exclusive. That means that when I'm iterating on UI, I either have to rely on the coding assistant showing me preview screenshots (cannot interact), firing up Device Hub (have to manually kick off a build after each change) or manually opening the associated preview (requires a lot of hoping back and forth). This feels inefficient and means I have to hop around and manage my windows and tabs more. A slight work around is to open a split view with the file and preview there. This layout is inefficient and clunky. I would love if Xcode supported a pinned preview next to coding assistant (or automatically showed the relevant one). I imagine this working just like showing a preview next to a file cmd + opt + return hides/shows the preview. FB23219611
Replies
4
Boosts
1
Views
889
Activity
Sep ’26
Strange Run Icon in Xcode 27
All my Xcode 27 versions (including Xcode 27.2. beta 2) have this strange Build & Run icon with a line through it. What does it mean and how can i change it? Screenshots of Xcode 27 in the App Store and the WWDC 27 videos show the normal triangle and no slash. Does anyone else see this on their Xcode 27? I works without problems, everything is normal, just this strange slash bothers me. Update: The official 27.1 release version has the normal triangle. It looks like this is for beta versions?
Replies
5
Boosts
0
Views
223
Activity
Sep ’26
SwiftUI Preview crash in Xcode 27 / iOS 27 simulator — segfault in libobjc map_images inside XCPreviewAgent's JIT-compiled preview binary (works with "Use Legacy Preview Execution")
Environment: Xcode 27 (macOS 27.0, build 26A428) iOS 27.0 simulator (build 24A434), tested on iPhone 18 Pro CoreSimulator 1174.9.2 Large app target: dozens of linked frameworks (first-party SPM modules plus several third-party SDKs) it occurred on xcode 26 also Description: SwiftUI canvas previews consistently crash XCPreviewAgent with EXC_BAD_ACCESS / SIGSEGV when rendering previews for a fairly large app target, across multiple different SwiftUI views (not tied to one specific file's code). Workaround found: the crash does not occur when "Use Legacy Preview Execution" is enabled (Xcode's preview settings). With the default (non-legacy, JIT-based) preview execution path, it crashes reliably; switching to legacy execution, previews render normally. Possible contributing factor — project size / timing: we suspect the size of the project may also be a factor, independent of the crash itself. The new (non-legacy) execution path recompiles/JITs the app for the canvas on every preview, and for a target this large that process takes noticeably longer than it does under legacy execution. It's plausible that on top of the crash described below, the new path is also more prone to timing out or failing under load on larger projects, simply because there's more to JIT-compile and load within whatever time budget the preview agent allows. We can't fully separate "crashes because of X" from "runs out of time because of project size" from the crash logs alone, but both seem worth flagging since they may share the same root cause in the new execution path's handling of larger binaries. Crash signature #1 (default preview execution, first attempts): Crashing Thread: 0 libswiftCore.dylib swift_conformsToProtocolMaybeInstantiateSuperclasses(...) 1 libswiftCore.dylib swift_conformsToProtocolWithExecutionContext 2 libswiftCore.dylib swift::_conformsToProtocol(...) 3 libswiftCore.dylib swift::_checkGenericRequirements(...) Termination: SIGSEGV / Segmentation fault: 11 Crash signature #2 (default preview execution, after removing an unrelated third-party SDK dependency from the previewed module, to rule it out as a cause): Crashing Thread ("com.apple.xojit_executor.wrapper_functions"): 0 libobjc.A.dylib readClass(objc_class*, bool, bool) 1 libobjc.A.dylib map_images_nolock 2 libobjc.A.dylib map_images 3 libobjc.A.dylib _objc_map_images 4-7 <unsymbolicated / anonymous image, source="A" (Absent) in the crash report> Exception: EXC_BAD_ACCESS (SIGSEGV), KERN_INVALID_ADDRESS In the second case, the crash log's usedImages list shows the frames above the objc runtime resolving to an image with no path, no resolvable UUID, and "source": "A" — this appears to be the dynamically JIT-compiled preview binary that XOJITExecutor builds and hot-loads for the canvas (rather than a normal on-disk framework), and the crash occurs while the Objective-C runtime is registering classes from it during _objc_map_images. What we've ruled out: Not caused by the specific SwiftUI view being previewed — reproduces across multiple unrelated views in the same target. Not caused by a specific third-party SDK: we removed a heavyweight closed-source analytics SDK dependency from the previewed module entirely (confirmed via successful xcodebuild build with zero references left), and the crash still occurred with an equivalent signature under default preview execution. Confirmed via symbolicated .ips crash reports in ~/Library/Logs/DiagnosticReports/XCPreviewAgent-*.ips that the crashing frames are inside Apple's own preview infrastructure (libobjc.A.dylib, libswiftCore.dylib, XOJITExecutor), not in application or third-party framework code. Confirmed the failure is specific to the new (non-legacy) preview execution path: enabling "Use Legacy Preview Execution" eliminates the crash entirely, with no other changes. Question for the community: Has anyone else seen SwiftUI Previews crash with a libobjc/map_images or swift_conformsToProtocol* segfault specifically on Xcode 27 / iOS 27 simulator with the new (non-legacy) preview execution path, for apps with a large number of linked frameworks? Does project size/build time make the new execution path more likely to fail or time out for anyone else? Is "Use Legacy Preview Execution" the recommended workaround until this is fixed, or should this be filed separately as Feedback?
Replies
3
Boosts
1
Views
559
Activity
Sep ’26
StoreKit testing not working on iOS26.5 simulator
Hi, I'm trying to run our StoreKit unit tests with Xcode26.5 on an iOS26.5 simulator. Host computer has macOS26.5. All tests are failing and in the console I see logs such as [SKTestSession] Error saving configuration file: Error Domain=SKInternalErrorDomain Code=3 "(null)" [SKTestSession] Error deleting all transactions: Error Domain=SKInternalErrorDomain Code=3 "(null)" [SKTestSession] Error clearing overrides: Error Domain=SKInternalErrorDomain Code=3 "(null)" [SKTestSession] Error setting value to 1 for identifier 2 for jp.unext.mediaplayer: Error Domain=SKInternalErrorDomain Code=3 "(null)" And the simulator asks me to provide my AppleID. Tests have been broken since at least 26.4 The release notes claims that it has been fixed but not for me. https://developer.apple.com/documentation/ios-ipados-release-notes/ios-ipados-26_5-release-notes#StoreKit-Testing-in-Xcode Does anyone else have the same issue? Reported FB22774836 just in case.
Replies
9
Boosts
11
Views
1.7k
Activity
Sep ’26
Xcode 27.1.0 Beta - Device Hub does not accept unsigned .app bundle drops
In previous versions of Simulator.app, you could drag an unsigned iOS .app bundle onto the Simulator screen to install it. This was useful functionality to allow for more easy distribution of simulator-only builds within a team without needing to worry about signing and distribution. This functionality appears to have been completely removed in Device Hub which is a shame.
Replies
1
Boosts
0
Views
251
Activity
Sep ’26
Device Hub Lacking External Display Option
Since the XCode 27 came out with the device hub, I can't found the option "External Display"! This is outrageous, since I have an app that only works with a external display connected! This menu existed on the menu bar of the simulators, but since the simulators was replaced by the device hub, I can't debug or test my app anymore!
Replies
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Sep ’26