For example, go to https://github.com/settings/personal-access-tokens/new, normally it would require you to verify your login. And because github supports and defaults to using passkey to login (if your account has a passkey), this would pop out.
Browser seems to be able to work fine if you just click continue. Passkey login seems to work fine too.
Below is the partial crash report from the pop out window.
Exception Name: NSInvalidArgumentException
Description: [NSXPCConnection sendInvocation]: Return type of methods sent over this proxy must be 'void' or 'NSProgress *' (isDeviceConfiguredForPasskeysWithTestOptions:)
User Info: (null)
0 CoreFoundation 0x00000001994698dc __exceptionPreprocess + 176
1 libobjc.A.dylib 0x0000000198f42418 objc_exception_throw + 88
2 Foundation 0x000000019b785710 -[NSXPCConnection _sendInvocation:orArguments:count:methodSignature:selector:withProxy:] + 2668
3 CoreFoundation 0x0000000199406d60 ___forwarding___ + 1072
4 CoreFoundation 0x0000000199406870 _CF_forwarding_prep_0 + 96
5 AuthenticationServicesCore 0x000000024b4c7740 -[ASCAgentProxy isDeviceConfiguredForPasskeysWithTestOptions:] + 172
6 AuthenticationServices 0x00000001cf8a46b8 block_destroy_helper + 3772
7 AuthenticationServices 0x00000001cf8a4010 block_destroy_helper + 2068
8 WebKit 0x000000010655e7f0 _ZZN6WebKit32WebAuthenticatorCoordinatorProxy45isUserVerifyingPlatformAuthenticatorAvailableERKN7WebCore18SecurityOriginDataEON3WTF17CompletionHandlerIFvbEEEEN3$_0clEb + 112
9 WebKit 0x000000010655e774 _ZN3WTF6Detail15CallableWrapperIZN6WebKit32WebAuthenticatorCoordinatorProxy45isUserVerifyingPlatformAuthenticatorAvailableERKN7WebCore18SecurityOriginDataEONS_17CompletionHandlerIFvbEEEE3$_0vJbEE4callEb + 40
10 WebKit 0x0000000105790a28 _ZNK3WTF8FunctionIFvN6WebKit13HidConnection8DataSentEEEclES3_ + 48
11 WebKit 0x000000010577f654 _ZN3WTF17CompletionHandlerIFvbEEclEb + 72
12 WebKit 0x000000010655ae0c _ZZZN6WebKitL39getArePasskeysDisallowedForRelyingPartyERKN7WebCore18SecurityOriginDataEON3WTF17CompletionHandlerIFvbEEEENUlbE_clEbENUlvE_clEv + 32
13 WebKit 0x000000010655ade0 _ZN3WTF6Detail15CallableWrapperIZZN6WebKitL48getCanCurrentProcessAccessPasskeyForRelyingPartyERKN7WebCore18SecurityOriginDataEONS_17CompletionHandlerIFvbEEEENUlbE_clEbEUlvE_vJEE4callEv + 28
14 JavaScriptCore 0x000000010c3eca5c _ZN3WTF7RunLoop11performWorkEPv + 440
15 CoreFoundation 0x000000019941c9e8 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 28
16 CoreFoundation 0x000000019941c97c __CFRunLoopDoSource0 + 172
17 CoreFoundation 0x000000019941c6e8 __CFRunLoopDoSources0 + 232
18 CoreFoundation 0x000000019941b378 __CFRunLoopRun + 820
19 CoreFoundation 0x00000001994d535c _CFRunLoopRunSpecificWithOptions + 532
20 HIToolbox 0x00000001a5ed8768 RunCurrentEventLoopInMode + 316
21 HIToolbox 0x00000001a5edba90 ReceiveNextEventCommon + 488
22 HIToolbox 0x00000001a6065308 _BlockUntilNextEventMatchingListInMode + 48
23 AppKit 0x000000019dd2c3c0 _DPSBlockUntilNextEventMatchingListInMode + 236
24 AppKit 0x000000019d825e34 _DPSNextEvent + 588
25 AppKit 0x000000019e2f3f44 -[NSApplication(NSEventRouting) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 688
26 AppKit 0x000000019e2f3c50 -[NSApplication(NSEventRouting) nextEventMatchingMask:untilDate:inMode:dequeue:] + 72
27 AppKit 0x000000019d81e780 -[NSApplication run] + 368
28 AppKit 0x000000019d80a6dc NSApplicationMain + 880
29 Orion 0x00000001008b02fc Orion + 8356604
30 dyld 0x0000000198fb5d54 start + 7184
Not crash, no error.
Version 1.0.3 (142), WebKit 624.1.2.19.2 Build date January 17, 2026 MacBook Pro (macOS Tahoe 26.1 build 25B78)
Tahoe (26)
