Imager crashes on launch via EXC_GUARD (SIGKILL), subtype GUARD_TYPE_MACH_PORT, violation INVALID_NAME. The faulting thread is DriveListModelPollThread. It calls mach_port_deallocate() on a Mach port that is already invalid — i.e. a double-deallocate / over-release of a port during storage enumeration. macOS's port guard kills the process immediately, so it's not recoverable.
I tested both v2.0.7 and v2.0.8 on the same machine. Both crash identically — same thread, same exception, same backtrace through Drivelist::ListStorageDevices(), differing only in port number and load addresses. The v2.0.7 release note "Remove legacy mountutils/drivelist" (#1513) does not appear to have removed or fixed this path on the macOS x86_64 build, and it persists in v2.0.8.
-------------------------------------
Translated Report (Full Report Below)
-------------------------------------
Process: rpi-imager [19841]
Path: /Applications/Raspberry Pi Imager.app/Contents/MacOS/rpi-imager
Identifier: com.raspberrypi.rpi-imager
Version: v2.0.8 (v2.0.8)
Code Type: X86-64 (Native)
Parent Process: launchd [1]
User ID: 502
Date/Time: 2026-05-20 12:22:45.8268 -0400
OS Version: macOS 15.7.7 (24G720)
Report Version: 12
Anonymous UUID: 95CE95F4-F372-738C-2088-90AE14F6DE5E
Sleep/Wake UUID: 3F55B991-743C-40C0-B801-261DA22010AB
Time Awake Since Boot: 36000 seconds
Time Since Wake: 9508 seconds
System Integrity Protection: enabled
Crashed Thread: 4 DriveListModelPollThread
Exception Type: EXC_GUARD (SIGKILL)
Exception Codes: GUARD_TYPE_MACH_PORT
Exception Codes: 0x0000000000006903, 0x0000000000000000
Termination Reason: Namespace GUARD, Code 2305845208236976387
Thread 0:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x7ff81a7d16f6 __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x7ff81a8112ae _pthread_cond_wait + 988
2 libQt6Core.6.dylib 0x108c961e3 0x108b04000 + 1647075
3 libQt6Core.6.dylib 0x108c96193 QWaitCondition::wait(QMutex*, QDeadlineTimer) + 87
4 libQt6Qml.6.dylib 0x10710a760 0x106e91000 + 2594656
5 libQt6Qml.6.dylib 0x1070ab397 0x106e91000 + 2204567
6 libQt6Qml.6.dylib 0x1070a0c4a 0x106e91000 + 2161738
7 libQt6Qml.6.dylib 0x1070a0ba2 QQmlTypeLoader::load(QQmlRefPointer<QQmlDataBlob> const&, QQmlTypeLoader::Mode) + 36
8 libQt6Qml.6.dylib 0x1070a4a12 QQmlTypeLoader::getType(QUrl const&, QQmlTypeLoader::Mode) + 452
9 libQt6Qml.6.dylib 0x106ff6b4a QQmlComponentPrivate::loadUrl(QUrl const&, QQmlComponent::CompilationMode) + 680
10 libQt6Qml.6.dylib 0x106fe1366 QQmlApplicationEnginePrivate::startLoad(QUrl const&, QByteArray const&, bool) + 538
11 libQt6Qml.6.dylib 0x106fe1b74 QQmlApplicationEngine::load(QUrl const&) + 52
12 rpi-imager 0x1065a54f4 main + 13780
13 dyld 0x7ff81a46b530 start + 3056
Thread 1:
0 libsystem_pthread.dylib 0x7ff81a80c834 start_wqthread + 0
Thread 2:
0 libsystem_pthread.dylib 0x7ff81a80c834 start_wqthread + 0
Thread 3:: QThread
0 libsystem_kernel.dylib 0x7ff81a7d58f2 poll + 10
1 libQt6Core.6.dylib 0x108c8af21 qt_safe_poll(pollfd*, unsigned int, QDeadlineTimer) + 76
2 libQt6Core.6.dylib 0x108c8e2e8 QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 408
3 libQt6Core.6.dylib 0x108b72589 QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 305
4 libQt6Core.6.dylib 0x108c10437 QThread::exec() + 161
5 libQt6Core.6.dylib 0x108c8c55e 0x108b04000 + 1607006
6 libsystem_pthread.dylib 0x7ff81a810e05 _pthread_start + 115
7 libsystem_pthread.dylib 0x7ff81a80c857 thread_start + 15
Thread 4 Crashed:: DriveListModelPollThread
0 libsystem_kernel.dylib 0x7ff81a7ce9fa _kernelrpc_mach_port_deallocate_trap + 10
1 libsystem_kernel.dylib 0x7ff81a7cfb96 mach_port_deallocate + 17
2 rpi-imager 0x10658530c 0x10654a000 + 242444
3 rpi-imager 0x106582860 0x10654a000 + 231520
4 rpi-imager 0x1065819e8 Drivelist::ListStorageDevices() + 2376
5 rpi-imager 0x1065be9fd DriveListModelPollThread::run() + 269
6 libQt6Core.6.dylib 0x108c8c55e 0x108b04000 + 1607006
7 libsystem_pthread.dylib 0x7ff81a810e05 _pthread_start + 115
8 libsystem_pthread.dylib 0x7ff81a80c857 thread_start + 15
Thread 5:: QQmlThread
0 CoreFoundation 0x7ff81a9c58b5 CF_IS_OBJC + 121
1 CoreFoundation 0x7ff81a88d11e CFStringGetCharactersPtr + 46
2 CoreFoundation 0x7ff81a8965b3 CFStringCompareWithOptionsAndLocale + 1202
3 CoreFoundation 0x7ff81a8e0da5 __CFSimpleMergeSort + 350
4 CoreFoundation 0x7ff81a8e0d1b __CFSimpleMergeSort + 212
5 CoreFoundation 0x7ff81a8e0d1b __CFSimpleMergeSort + 212
6 CoreFoundation 0x7ff81a8e0d1b __CFSimpleMergeSort + 212
7 CoreFoundation 0x7ff81a8e0d34 __CFSimpleMergeSort + 237
8 CoreFoundation 0x7ff81a8e0d34 __CFSimpleMergeSort + 237
9 CoreFoundation 0x7ff81a8e0b96 CFSortIndexes + 502
10 CoreFoundation 0x7ff81a8e081e CFQSortArray + 296
11 CoreFoundation 0x7ff81a8e0688 CFArraySortValues + 914
12 libFontRegistry.dylib 0x7ff823ec293c TCFSet<void const*>::CreateSortedArray(CFComparisonResult (*)(void const*, void const*, void*), void*, CFArrayCallBacks const*) const + 204
13 libFontRegistry.dylib 0x7ff823ee4f8b XTCopyAvailableFamilyNames2 + 242
14 CoreText 0x7ff81cee0090 TDescriptorSource::CopyAvailableFamilyNames(__CFString const*) const + 152
15 CoreText 0x7ff81cedffa6 CTFontManagerCopyAvailableFontFamilyNames + 40
16 libQt6Gui.6.dylib 0x10879a2ed QCoreTextFontDatabase::populateFontDatabase() + 199
17 libQt6Gui.6.dylib 0x1086d1b0f QFontDatabasePrivate::ensureFontDatabase() + 185
18 libQt6Gui.6.dylib 0x1086d3cd9 QFontDatabase::hasFamily(QString const&) + 141
19 libQt6QuickControls2Material.6.dylib 0x2da789a51 QQuickMaterialTheme::initialize(QQuickTheme*) + 245
20 libQt6QuickControls2.6.dylib 0x2d1479648 QQuickStylePlugin::registerTypes(char const*) + 1232
21 libQt6Qml.6.dylib 0x1070326d1 QQmlMetaType::registerPluginTypes(QObject*, QString const&, QString const&, QString const&, QTypeRevision, QList<QQmlError>*) + 735
22 libQt6Qml.6.dylib 0x1070570bd 0x106e91000 + 1859773
23 libQt6Qml.6.dylib 0x107058400 0x106e91000 + 1864704
24 libQt6Qml.6.dylib 0x10701c75b QQmlImports::importExtension(QQmlTypeLoader*, QString const&, QTypeRevision, QQmlTypeLoaderQmldirContent const*, QList<QQmlError>*) + 501
25 libQt6Qml.6.dylib 0x10701d3c8 QQmlImports::addLibraryImport(QQmlTypeLoader*, QString const&, QString const&, QTypeRevision, QString const&, QString const&, QFlags<QQmlImports::ImportFlag>, unsigned short, QList<QQmlError>*) + 774
26 libQt6Qml.6.dylib 0x1070a7119 0x106e91000 + 2187545
27 libQt6Qml.6.dylib 0x1070a325d QQmlTypeLoader::Blob::addLibraryImport(std::__1::shared_ptr<QQmlTypeLoader::Blob::PendingImport> const&, QList<QQmlError>*) + 1503
28 libQt6Qml.6.dylib 0x1070a4024 QQmlTypeLoader::Blob::loadDependentImports(QList<QQmlDirParser::Import> const&, QString const&, QTypeRevision, unsigned short, QFlags<QQmlImports::ImportFlag>, QList<QQmlError>*) + 436
29 libQt6Qml.6.dylib 0x1070a25f3 QQmlTypeLoader::Blob::loadImportDependencies(std::__1::shared_ptr<QQmlTypeLoader::Blob::PendingImport> const&, QString const&, QFlags<QQmlImports::ImportFlag>, QList<QQmlError>*) + 573
30 libQt6Qml.6.dylib 0x1070a7153 0x106e91000 + 2187603
31 libQt6Qml.6.dylib 0x1070a325d QQmlTypeLoader::Blob::addLibraryImport(std::__1::shared_ptr<QQmlTypeLoader::Blob::PendingImport> const&, QList<QQmlError>*) + 1503
32 libQt6Qml.6.dylib 0x1070a3c55 QQmlTypeLoader::Blob::addImport(QV4::CompiledData::Import const*, QFlags<QQmlImports::ImportFlag>, QList<QQmlError>*) + 79
33 libQt6Qml.6.dylib 0x107094e9f 0x106e91000 + 2113183
34 libQt6Qml.6.dylib 0x1070a1a48 QQmlTypeLoader::setData(QQmlRefPointer<QQmlDataBlob> const&, QQmlDataBlob::SourceCodeData const&) + 88
35 libQt6Qml.6.dylib 0x1070a1437 QQmlTypeLoader::setData(QQmlRefPointer<QQmlDataBlob> const&, QString const&) + 135
36 libQt6Qml.6.dylib 0x1070a122e QQmlTypeLoader::loadThread(QQmlRefPointer<QQmlDataBlob> const&) + 382
37 libQt6Qml.6.dylib 0x1070ab9be 0x106e91000 + 2206142
38 libQt6Qml.6.dylib 0x10710a41e 0x106e91000 + 2593822
39 libQt6Qml.6.dylib 0x10710a3cb 0x106e91000 + 2593739
40 libQt6Core.6.dylib 0x108b6c1b7 QCoreApplication::notifyInternal2(QObject*, QEvent*) + 137
41 libQt6Core.6.dylib 0x108b6ce4c QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) + 548
42 libQt6Core.6.dylib 0x108c8e1a2 QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 82
43 libQt6Core.6.dylib 0x108b72589 QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 305
44 libQt6Core.6.dylib 0x108c10437 QThread::exec() + 161
45 libQt6Core.6.dylib 0x108c8c55e 0x108b04000 + 1607006
46 libsystem_pthread.dylib 0x7ff81a810e05 _pthread_start + 115
47 libsystem_pthread.dylib 0x7ff81a80c857 thread_start + 15
Thread 4 crashed with X86 Thread State (64-bit):
rax: 0x000000000000000f rbx: 0x0000000000006903 rcx: 0x00007000023e8748 rdx: 0x0000000000000000
rdi: 0x0000000000000203 rsi: 0x0000000000006903 rbp: 0x00007000023e8760 rsp: 0x00007000023e8748
r8: 0x0000000000000004 r9: 0x0000000000000000 r10: 0x00007ff81a7ce9fa r11: 0x0000000000000293
r12: 0x0000000000000000 r13: 0x0000000000000000 r14: 0x0000000000000203 r15: 0x00006000016e86c0
rip: 0x00007ff81a7ce9fa rfl: 0x0000000000000293 cr2: 0x0000000000000000
Logical CPU: 0
Error Code: 0x01000012
Trap Number: 133
Binary Images:
0x10654a000 - 0x106a00fff com.raspberrypi.rpi-imager (v2.0.8) <87239ac3-bb4f-3083-9368-0b4a2924a912> /Applications/Raspberry Pi Imager.app/Contents/MacOS/rpi-imager
0x1074ea000 - 0x107862fff libQt6Quick.6.dylib (*) <6d8f79aa-e93b-3e58-90a2-5e473f96d694> /Applications/Raspberry Pi Imager.app/Contents/Frameworks/libQt6Quick.6.dylib
0x106c41000 - 0x106c8cfff libQt6Svg.6.dylib (*) <5b1ad7ce-5643-3b15-9bfe-b2b98628d28b> /Applications/Raspberry Pi Imager.app/Contents/Frameworks/libQt6Svg.6.dylib
0x106b61000 - 0x106b61fff com.apple.framework.CoreWLAN (16.0) <f9406e19-e560-343c-a88f-55571d0fedee> /System/Library/Frameworks/CoreWLAN.framework/Versions/A/CoreWLAN
0x106bc7000 - 0x106bdbfff libQt6QmlMeta.6.dylib (*) <204b5024-1a4e-3af2-a583-907cfd6ad8a0> /Applications/Raspberry Pi Imager.app/Contents/Frameworks/libQt6QmlMeta.6.dylib
0x106ba6000 - 0x106baffff libQt6QmlWorkerScript.6.dylib (*) <2398cdc2-2fc5-33d6-a8f0-cebcf40eb3ef> /Applications/Raspberry Pi Imager.app/Contents/Frameworks/libQt6QmlWorkerScript.6.dylib
0x106df5000 - 0x106e62fff libQt6QmlModels.6.dylib (*) <7c73f0b0-315c-3785-a15f-bd2a4f82bdc1> /Applications/Raspberry Pi Imager.app/Contents/Frameworks/libQt6QmlModels.6.dylib
0x106e91000 - 0x10719dfff libQt6Qml.6.dylib (*) <a1844fbd-f452-3f85-866e-5918218d5893> /Applications/Raspberry Pi Imager.app/Contents/Frameworks/libQt6Qml.6.dylib
0x106cba000 - 0x106d94fff libQt6Network.6.dylib (*) <1da3dfb7-24c3-33c2-9a46-b14184424419> /Applications/Raspberry Pi Imager.app/Contents/Frameworks/libQt6Network.6.dylib
0x107379000 - 0x1073cdfff libQt6OpenGL.6.dylib (*) <bca7970d-b5ca-36ce-a223-d7248be97b48> /Applications/Raspberry Pi Imager.app/Contents/Frameworks/libQt6OpenGL.6.dylib
0x108520000 - 0x1089cefff libQt6Gui.6.dylib (*) <6dcad3ea-da9d-3ac6-9655-72417fd28a2c> /Applications/Raspberry Pi Imager.app/Contents/Frameworks/libQt6Gui.6.dylib
0x108b04000 - 0x108ec2fff libQt6Core.6.dylib (*) <f304c341-df83-321e-9360-e1e0155331c8> /Applications/Raspberry Pi Imager.app/Contents/Frameworks/libQt6Core.6.dylib
0x106bef000 - 0x106bfdfff com.apple.CoreWiFi (1.0) <fd1c2624-54f7-3818-b4a6-61b68f81ffd6> /System/Library/PrivateFrameworks/CoreWiFi.framework/Versions/A/CoreWiFi
0x106c1f000 - 0x106c22fff com.apple.IO80211 (1.0) <cc837832-e7ac-35d7-8f85-8b121fa96817> /System/Library/PrivateFrameworks/IO80211.framework/Versions/A/IO80211
0x108f9b000 - 0x108feefff IO80211Old.dylib (*) <d5cf0107-6e6e-383c-abe9-d66eb450ae2d> /System/Library/PrivateFrameworks/IO80211.framework/Versions/A/IO80211Old.dylib
0x178afc000 - 0x178c97fff CoreWiFiOld.dylib (*) <d5cf0107-23e9-3d37-bf68-8c6a05c9024c> /System/Library/PrivateFrameworks/CoreWiFi.framework/Versions/A/CoreWiFiOld.dylib
0x106b97000 - 0x106b98fff com.apple.WiFiPeerToPeer (735.2.0) <4677bb02-ab92-31a2-b6c8-943d4e522c6b> /System/Library/PrivateFrameworks/WiFiPeerToPeer.framework/Versions/A/WiFiPeerToPeer
0x1e1f15000 - 0x1e1f3cfff WiFiPeerToPeerOld.dylib (*) <d5cf0107-33e0-337b-ba08-5e2854254fd0> /System/Library/PrivateFrameworks/WiFiPeerToPeer.framework/Versions/A/WiFiPeerToPeerOld.dylib
0x258f6b000 - 0x258fe5fff CoreWLANOld.dylib (*) <d5cf0107-ffdd-3481-a8d3-a2df28f40b76> /System/Library/Frameworks/CoreWLAN.framework/Versions/A/CoreWLANOld.dylib
0x107312000 - 0x107328fff com.apple.security.csparser (3.0) <ca9652cd-23f6-3d13-bc26-f7cd365a872f> /System/Library/Frameworks/Security.framework/Versions/A/PlugIns/csparser.bundle/Contents/MacOS/csparser
0x107b5b000 - 0x107bdbfff libqcocoa.dylib (*) <81f072d2-96ee-34ee-9d87-ca7c006358b4> /Applications/Raspberry Pi Imager.app/Contents/PlugIns/platforms/libqcocoa.dylib
0x107b07000 - 0x107b13fff libobjc-trampolines.dylib (*) <72642d3c-0206-38ee-9349-c720aee663ee> /usr/lib/libobjc-trampolines.dylib
0x107ae9000 - 0x107aedfff libqwbmp.dylib (*) <80d30d09-79ef-3c9e-8abc-0207009c8caa> /Applications/Raspberry Pi Imager.app/Contents/PlugIns/imageformats/libqwbmp.dylib
0x2da0eb000 - 0x2da140fff libqwebp.dylib (*) <38b08062-f05d-3440-81d3-b0ea8462d9bf> /Applications/Raspberry Pi Imager.app/Contents/PlugIns/imageformats/libqwebp.dylib
0x107b47000 - 0x107b4dfff libqico.dylib (*) <d2b6416a-b5b3-359c-b033-f26cb8fd438d> /Applications/Raspberry Pi Imager.app/Contents/PlugIns/imageformats/libqico.dylib
0x2da02d000 - 0x2da033fff libqmacheif.dylib (*) <c180ed3a-8e57-372e-b948-013a5c3baedf> /Applications/Raspberry Pi Imager.app/Contents/PlugIns/imageformats/libqmacheif.dylib
0x2da03e000 - 0x2da0a6fff libqjpeg.dylib (*) <b7034491-686b-32d8-b91a-39e19c87246c> /Applications/Raspberry Pi Imager.app/Contents/PlugIns/imageformats/libqjpeg.dylib
0x2da225000 - 0x2da280fff libqtiff.dylib (*) <494e2ea6-bb1b-306d-a42e-bb17cb59bf0b> /Applications/Raspberry Pi Imager.app/Contents/PlugIns/imageformats/libqtiff.dylib
0x107af8000 - 0x107afcfff libqsvg.dylib (*) <49e34a61-05e1-3000-a29e-f36e11e544be> /Applications/Raspberry Pi Imager.app/Contents/PlugIns/imageformats/libqsvg.dylib
0x107b1c000 - 0x107b24fff libqicns.dylib (*) <6f7c8398-6044-3d70-8c02-c24501ac6700> /Applications/Raspberry Pi Imager.app/Contents/PlugIns/imageformats/libqicns.dylib
0x107b2f000 - 0x107b33fff libqtga.dylib (*) <6fa59a84-341d-3b97-b967-fef528e5eeee> /Applications/Raspberry Pi Imager.app/Contents/PlugIns/imageformats/libqtga.dylib
0x2da151000 - 0x2da157fff libqmacjp2.dylib (*) <1ad05001-468a-315f-be9e-54174382fee1> /Applications/Raspberry Pi Imager.app/Contents/PlugIns/imageformats/libqmacjp2.dylib
0x2d1418000 - 0x2d141bfff libquickwindowplugin.dylib (*) <277bd8e2-4bb6-3e65-86d2-9f2adbd379dc> /Applications/Raspberry Pi Imager.app/Contents/PlugIns/quick/libquickwindowplugin.dylib
0x2d13f6000 - 0x2d13fefff libqtquickcontrols2plugin.dylib (*) <94e27c36-b772-34e6-a9ef-bf4d456b1d73> /Applications/Raspberry Pi Imager.app/Contents/PlugIns/quick/libqtquickcontrols2plugin.dylib
0x2d14bb000 - 0x2d14defff libQt6QuickControls2Impl.6.dylib (*) <97c6b4c8-419b-3f98-8b0e-d533525a6ac7> /Applications/Raspberry Pi Imager.app/Contents/Frameworks/libQt6QuickControls2Impl.6.dylib
0x2d146d000 - 0x2d147cfff libQt6QuickControls2.6.dylib (*) <f32afcb7-6b2b-3d73-8495-b5cace387002> /Applications/Raspberry Pi Imager.app/Contents/Frameworks/libQt6QuickControls2.6.dylib
0x2da5d4000 - 0x2da6c2fff libQt6QuickTemplates2.6.dylib (*) <03e52c14-e1ed-3099-bb2d-58cb3232cfae> /Applications/Raspberry Pi Imager.app/Contents/Frameworks/libQt6QuickTemplates2.6.dylib
0x2d1450000 - 0x2d1456fff libqtquickcontrols2materialstyleplugin.dylib (*) <953344eb-f5ce-3f44-8f51-f8d77761fbd6> /Applications/Raspberry Pi Imager.app/Contents/PlugIns/quick/libqtquickcontrols2materialstyleplugin.dylib
0x2da77e000 - 0x2da8d2fff libQt6QuickControls2Material.6.dylib (*) <8eb3dd0e-4139-3d9c-9449-0d6a83433793> /Applications/Raspberry Pi Imager.app/Contents/Frameworks/libQt6QuickControls2Material.6.dylib
0x2d159e000 - 0x2d15d1fff libQt6QuickControls2MaterialStyleImpl.6.dylib (*) <4872356e-f770-31ee-8fbf-8f76376b34ea> /Applications/Raspberry Pi Imager.app/Contents/Frameworks/libQt6QuickControls2MaterialStyleImpl.6.dylib
0x7ff81a7ce000 - 0x7ff81a80ab1f libsystem_kernel.dylib (*) <a1b690f6-953c-34b8-91cc-860786ff5fa1> /usr/lib/system/libsystem_kernel.dylib
0x7ff81a80b000 - 0x7ff81a816fd7 libsystem_pthread.dylib (*) <fa0539b0-b910-38ec-9406-18f7fb96ab75> /usr/lib/system/libsystem_pthread.dylib
0x7ff81a465000 - 0x7ff81a4ff6c7 dyld (*) <8d7a2378-0c9a-3c22-bf24-79ab3cf6d207> /usr/lib/dyld
0x0 - 0xffffffffffffffff ??? (*) <00000000-0000-0000-0000-000000000000> ???
0x7ff81a87f000 - 0x7ff81ad33fe2 com.apple.CoreFoundation (6.9) <fac0da29-e741-3612-9556-af22c244e02e> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
0x7ff823eb4000 - 0x7ff823f0021f libFontRegistry.dylib (*) <b5dd307c-8f60-3275-8f72-dc39921b33e8> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ATS.framework/Versions/A/Resources/libFontRegistry.dylib
0x7ff81ce74000 - 0x7ff81d0ad41c com.apple.CoreText (844.20.0.1) <4a0dbd5c-1295-3159-9ea7-3b9df727c800> /System/Library/Frameworks/CoreText.framework/Versions/A/CoreText
External Modification Summary:
Calls made by other processes targeting this process:
task_for_pid: 0
thread_create: 0
thread_set_state: 0
Calls made by this process:
task_for_pid: 0
thread_create: 0
thread_set_state: 0
Calls made by all processes on this machine:
task_for_pid: 0
thread_create: 0
thread_set_state: 0
VM Region Summary:
ReadOnly portion of Libraries: Total=550.8M resident=0K(0%) swapped_out_or_unallocated=550.8M(100%)
Writable regions: Total=8.4G written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=8.4G(100%)
VIRTUAL REGION
REGION TYPE SIZE COUNT (non-coalesced)
=========== ======= =======
Activity Tracing 256K 1
ColorSync 224K 25
Foundation 16K 1
JS VM Gigacage 4096K 1
JS VM Isolated Heap 4368K 4
JS VM Isolated Heap (reserved) 2048K 1 reserved VM address space (unallocated)
Kernel Alloc Once 8K 1
MALLOC 1.3G 45
MALLOC guard page 72K 18
STACK GUARD 56.0M 6
Stack 18.0M 7
VM_ALLOCATE 76K 4
VM_ALLOCATE (reserved) 7.1G 11 reserved VM address space (unallocated)
__CTF 824 1
__DATA 8333K 428
__DATA_CONST 44.4M 434
__DATA_DIRTY 796K 113
__FONT_DATA 2352 1
__LINKEDIT 169.6M 42
__OBJC_RO 61.3M 1
__OBJC_RW 2396K 3
__TEXT 381.2M 449
__TPRO_CONST 16 2
dsce.got 124K 1
dyld private memory 384K 3
mapped file 204.2M 18
shared memory 792K 18
=========== ======= =======
TOTAL 9.3G 1639
TOTAL, minus reserved VM space 2.3G 1639
-----------
Full Report
-----------
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"vmSummary" : "ReadOnly portion of Libraries: Total=550.8M resident=0K(0%) swapped_out_or_unallocated=550.8M(100%)\nWritable regions: Total=8.4G written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=8.4G(100%)\n\n VIRTUAL REGION \nREGION TYPE SIZE COUNT (non-coalesced) \n=========== ======= ======= \nActivity Tracing 256K 1 \nColorSync 224K 25 \nFoundation 16K 1 \nJS VM Gigacage 4096K 1 \nJS VM Isolated Heap 4368K 4 \nJS VM Isolated Heap (reserved) 2048K 1 reserved VM address space (unallocated)\nKernel Alloc Once 8K 1 \nMALLOC 1.3G 45 \nMALLOC guard page 72K 18 \nSTACK GUARD 56.0M 6 \nStack 18.0M 7 \nVM_ALLOCATE 76K 4 \nVM_ALLOCATE (reserved) 7.1G 11 reserved VM address space (unallocated)\n__CTF 824 1 \n__DATA 8333K 428 \n__DATA_CONST 44.4M 434 \n__DATA_DIRTY 796K 113 \n__FONT_DATA 2352 1 \n__LINKEDIT 169.6M 42 \n__OBJC_RO 61.3M 1 \n__OBJC_RW 2396K 3 \n__TEXT 381.2M 449 \n__TPRO_CONST 16 2 \ndsce.got 124K 1 \ndyld private memory 384K 3 \nmapped file 204.2M 18 \nshared memory 792K 18 \n=========== ======= ======= \nTOTAL 9.3G 1639 \nTOTAL, minus reserved VM space 2.3G 1639 \n",
"legacyInfo" : {
"threadTriggered" : {
"name" : "DriveListModelPollThread"
}
},
"logWritingSignature" : "9f26ceaf1d2306b9e5c2cc73e9fdbbe012ce5877",
"trialInfo" : {
"rollouts" : [
{
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"factorPackIds" : {
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},
{
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}
What happened?
Imager crashes on launch via EXC_GUARD (SIGKILL), subtype GUARD_TYPE_MACH_PORT, violation INVALID_NAME. The faulting thread is DriveListModelPollThread. It calls mach_port_deallocate() on a Mach port that is already invalid — i.e. a double-deallocate / over-release of a port during storage enumeration. macOS's port guard kills the process immediately, so it's not recoverable.
I tested both v2.0.7 and v2.0.8 on the same machine. Both crash identically — same thread, same exception, same backtrace through Drivelist::ListStorageDevices(), differing only in port number and load addresses. The v2.0.7 release note "Remove legacy mountutils/drivelist" (#1513) does not appear to have removed or fixed this path on the macOS x86_64 build, and it persists in v2.0.8.
Faulting backtrace (Thread 4, identical across 2.0.7 and 2.0.8):
0 libsystem_kernel.dylib _kernelrpc_mach_port_deallocate_trap + 10
1 libsystem_kernel.dylib mach_port_deallocate + 17
2 rpi-imager + 242444
3 rpi-imager + 231520
4 rpi-imager Drivelist::ListStorageDevices() + 2376
5 rpi-imager DriveListModelPollThread::run() + 269
6 libQt6Core.6.dylib QThread internal + 1607006
7 libsystem_pthread.dylib _pthread_start + 115
8 libsystem_pthread.dylib thread_start + 15
Exception detail (v2.0.8 instance):
Exception Type: EXC_GUARD (SIGKILL)
Exception Codes: GUARD_TYPE_MACH_PORT
INVALID_NAME on mach port 26883 (guarded with 0x0)
Termination: Namespace GUARD, Code 2305845208236976387
Crashed Thread: 4 DriveListModelPollThread
(v2.0.7 instance was the same with port 27651.)
Steps to reproduce:
Launch Raspberry Pi Imager on macOS Intel.
Crash occurs during the background drive-polling cycle, shortly after launch. Appears timing-dependent.
Version:
v2.0.8 (also reproduced on v2.0.7) — macOS x86_64 build
What host operating system are you using?
macOS 15.7.7 (24G720)
What host operating system architecture are you using?
x86_64 (Intel) — iMac19,1, 8-core Core i9, SIP enabled
Additional context:
Likely related to the macOS 15.5+ drive-polling problems in #1160 (UI jank/freeze when querying storage); this is a hard crash in the same background-polling subsystem rather than a freeze. The two rpi-imager frames above frames 2–3 are unsymbolicated in my reports but should resolve cleanly against your debug symbols for v2.0.7/v2.0.8. Full .ips crash reports for both versions available on request.
Version
2.0.8
What host operating system were you using?
macOS
Host OS Version
macOS 15.7.7 (24G720)
Selected OS
none - crashes on startup
Which Raspberry Pi Device are you using?
Raspberry Pi 5, 500, and Compute Modules 5
What kind of storage device are you using?
microSD Card in an internal reader
OS Customisation
Relevant log output