iOS 18 Simulator Crash on Xcode 26: Symbol not found: _NSUserActivityTypeBrowsingWeb

Question

Alexander.Pan OP

Created 1w

Replies 8

Boosts 1

Participants 4

Hi,

When launching my app on the iOS 18 simulator using Xcode 26 beta, the app crashes immediately with a missing symbol error:

dyld[23801]: Symbol not found: _NSUserActivityTypeBrowsingWeb
  Referenced from: <DDBF5C50-BD0E-34C7-B202-888033A93840> /Users/username/Library/Developer/CoreSimulator/Devices/058F6615-9288-4164-8736-53CBC962FFD4/data/Containers/Bundle/Application/95B984C9-3197-423C-860C-E714BA34ACCB/MyApp.app/MyApp.debug.dylib
  Expected in:     <443671DB-41AE-3963-8403-E4A484837405> /Library/Developer/CoreSimulator/Volumes/iOS_22A3351/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.0.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/CoreServices.framework/CoreServices
Symbol not found: _NSUserActivityTypeBrowsingWeb
  Referenced from: <DDBF5C50-BD0E-34C7-B202-888033A93840> /Users/username/Library/Developer/CoreSimulator/Devices/058F6615-9288-4164-8736-53CBC962FFD4/data/Containers/Bundle/Application/95B984C9-3197-423C-860C-E714BA34ACCB/MyApp.app/MyApp.debug.dylib
  Expected in:     <443671DB-41AE-3963-8403-E4A484837405> /Library/Developer/CoreSimulator/Volumes/iOS_22A3351/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.0.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/CoreServices.framework/CoreServices
dyld config: DYLD_SHARED_CACHE_DIR=/Library/Developer/CoreSimulator/Caches/dyld/24F74/com.apple.CoreSimulator.SimRuntime.iOS-18-0.22A3351/ DYLD_ROOT_PATH=/Library/Developer/CoreSimulator/Volumes/iOS_22A3351/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.0.simruntime/Contents/Resources/RuntimeRoot DYLD_LIBRARY_PATH=/Users/username/Library/Developer/Xcode/DerivedData/MyApp-dqwvveywparbascmmycuqktsiopv/Build/Products/Debug-iphonesimulator:/Library/Developer/CoreSimulator/Volumes/iOS_22A3351/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.0.simruntime/Contents/Resources/RuntimeRoot/usr/lib/system/introspection DYLD_INSERT_LIBRARIES=/Library/Developer/CoreSimulator/Volumes/iOS_22A3351/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.0.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libLogRedirect.dylib:/Library/Developer/CoreSimulator/Volumes/iOS_22A3351/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.0.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libBacktraceRecording.dylib:/Library/Developer/CoreSimulator/Volumes/iOS_22A3351/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.0.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libMainThreadChecker.dylib:/usr/lib/libRPAC.dylib:/Library/Developer/CoreSimulator/Volumes/iOS_22A3351/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.0.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libViewDebuggerSupport.dylib:/System/Library/PrivateFrameworks/GPUToolsCapture.framework/GPUToolsCapture DYLD_FRAMEWORK_PATH=/Users/username/Library/Developer/Xcode/DerivedData/MyApp-dqwvveywparbascmmycuqktsiopv/Build/Products/Debug-iphonesimulator DYLD_FALLBACK_FRAMEWORK_PATH=/Library/Developer/CoreSimulator/Volumes/iOS_22A3351/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.0.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks DYLD_FALLBACK_LIBRARY_PATH=/Library/Developer/CoreSimulator/Volumes/iOS_22A3351/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.0.simruntime/Contents/Resources/

Notes:

I have only tested on the iOS 18 simulator so far.

I have not yet tested on earlier iOS versions or physical devices.

The app runs fine on iOS 26 simulator using Xcode 26, so the crash seems specific to the iOS 18 simulator.

This looks like a system symbol that may not be linked properly in the iOS 18 simruntime.

Is this a known issue with the iOS 18 SDK or simulator runtime in Xcode 26 beta?

Thanks!

Answered by Alexander.Pan in 846027022

Removing CoreServices.framework from Frameworks and Libraries in the Build Phases resolved the issue.

Boost

Answer 1

DTS Engineer OP

Apple

1w

NSUserActivityTypeBrowsingWeb is not a new API, so opening a bug report would be appreciated here. Please post the FB number here for the record.

— Ed Ford,  DTS Engineer

1

Answer 2

Alexander.Pan OP

1w

Xcode 26.0 Beta (17A5241e) This issue continues to occur.

0

Answer 3

Alexander.Pan OP

1w

I've submitted a bug report as suggested — the Feedback ID is FB18393087.

0

Answer 4

Alexander.Pan OP

1w

Accepted Answer

Removing CoreServices.framework from Frameworks and Libraries in the Build Phases resolved the issue.

1

Answer 5

lluismoratoguardia OP

1w

I'm having what seems to be the same or similar issue, but CoreServices.framework doesn't appear in Build Phases, any idea?

iOS 26 working great, but when I compile on iOS 18.5, I get this crash upon startup:

  Referenced from: <6D911850-31F9-34F9-A0B0-8C1A3A80FE67> /private/var/containers/Bundle/Application/3DD5AE67-E8FE-4032-B58F-BAC51485C2BA/{project}.app/{project}.debug.dylib
  Expected in:     <050203DD-7488-307D-A999-E587314B041A> /System/Library/Frameworks/CoreServices.framework/CoreServices
dyld config: DYLD_LIBRARY_PATH=/usr/lib/system/introspection DYLD_INSERT_LIBRARIES=/usr/lib/libLogRedirect.dylib:/usr/lib/libBacktraceRecording.dylib:/usr/lib/libMainThreadChecker.dylib:/usr/lib/libRPAC.dylib:/usr/lib/libViewDebuggerSupport.dylib
Symbol not found: _NSUserActivityTypeBrowsingWeb
  Referenced from: <6D911850-31F9-34F9-A0B0-8C1A3A80FE67> /private/var/containers/Bundle/Application/3DD5AE67-E8FE-4032-B58F-BAC51485C2BA/{project}.app/{project}.debug.dylib
  Expected in:     <050203DD-7488-307D-A999-E587314B041A> /System/Library/Frameworks/CoreServices.framework/CoreServices
dyld config: DYLD_LIBRARY_PATH=/usr/lib/system/introspection DYLD_INSERT_LIBRARIES=/usr/lib/libLogRedirect.dylib:/usr/lib/libBacktraceRecording.dylib:/usr/lib/libMainThreadChecker.dylib:/usr/lib/libRPAC.dylib:/usr/lib/libViewDebuggerSupport.dylib

0

Answer 6

DTS Engineer OP

Apple

1w

@Alexander.Pan, thank you for taking the time to file the report, we really appreciate it.

— Ed Ford,  DTS Engineer

0

Answer 7

lluismoratoguardia OP

1w

After further investigation, the origin of my crash is from FirebaseMessaging.

0

Answer 8

johnauger81 OP

1w

I'm also seeing this issue. Can also confirm removing CoreServices.framework resolves the crash, but unsure what the other implications of removing this are...?

0