Suddenly MuseScore crashes every time I want to open it

[karenarangomusic]

Issue type

Crash or freeze

Description with steps to reproduce

I’m writing because MuseScore (both the stable version 4.6.5 and the latest nightly build) crashes immediately on my Mac as soon as it tries to open the main window.

Here are my system details:

• Mac model: MacBook Pro 14-inch (Nov 2024)
• Chip: Apple M4
• Memory: 16 GB
• macOS version: macOS Tahoe 26.4
• Startup disk: Macintosh HD

What happens (this text was written by Copilot after doing several steps it suggested to try to fix the problem):

MuseScore starts loading normally (audio engine, fonts, QML, MuseSampler, etc.), but it crashes with a “Segmentation fault: 11” right after the line:

GuiApp::perform | Using graphics api: "metal"

The crash happens whether I launch it normally, from Terminal, with OpenGL, or with software rendering.

Versions tested:

• MuseScore 4.6.5 (stable)
• Latest 4.7 nightly build (from the official nightly server)

Troubleshooting already attempted:

• Reinstalled Rosetta
• Launched MuseScore with OpenGL (-platform cocoa:renderer=opengl)
• Launched with software rendering (QT_QUICK_BACKEND=software)
• Reset extended attributes (xattr -cr)
• Granted all permissions (Full Disk Access, Accessibility, Screen Recording, Automation, Files & Folders)
• Deleted all SMuFL custom fonts
• Deleted the entire SMuFL folder
• Tried launching from Applications and directly from the .dmg
• Tried the nightly build (same crash)

Log excerpt:
The crash always ends with:
Segmentation fault: 11

I would really appreciate your help, as the application never manages to open the main window. Please let me know if you need the full log file or any additional system information.

Thank you very much for your time and support.

Supporting files, videos and screenshots

MuseScore.Crash.mp4

In which versions of MuseScore Studio is this issue present?

4.7.0 beta, but it presented in the previous versions since the update of January

Regression

Yes, this used to work in a previous version of MuseScore 4.x

Operating system

Mac OS Tahoe 26.4.1

Additional context

No response

Checklist

• This report follows the guidelines for reporting bugs and issues
• I have verified that this issue has not been logged before, by searching the issue tracker for similar issues
• I have attached all requested files and information to this report
• I have attempted to identify the root problem as concisely as possible, and have used minimal reproducible examples where possible

[avvvvve]

@RomanPudashkin Please check the log excerpt here and advise if we need the full log files. Thanks!

[reactormonk]

I can confirm on Linux, qt version 6.11.0-2

0x00007fffa5a10a26 in QQuickScrollBarPrivate::setPosition (this=0x55555d3bf3c0, newPosition=0.5, 
    notifyVisualChange=notifyVisualChange@entry=true)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/quicktemplates/qquickscrollbar.cpp:479
479                 QAccessibleValueChangeEvent event(q, valueInterface->currentValue());
(gdb) bt
#0  0x00007fffa5a10a26 in QQuickScrollBarPrivate::setPosition
    (this=0x55555d3bf3c0, newPosition=0.5, notifyVisualChange=notifyVisualChange@entry=true)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/quicktemplates/qquickscrollbar.cpp:479
#1  0x00007fffa5a16190 in QQuickScrollBar::setPosition (this=0x55555d3bf2e0, position=<optimized out>)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/quicktemplates/qquickscrollbar.cpp:457
#2  QQuickScrollBarAttachedPrivate::initVertical (this=this@entry=0x55555d3b9970)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/quicktemplates/qquickscrollbar.cpp:1025
#3  0x00007fffa5a167ef in QQuickScrollBarAttached::setVertical (this=0x55555d3a80e0, vertical=0x55555d3bf2e0)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/quicktemplates/qquickscrollbar.cpp:1318
#4  0x00007ffff5dcf08b in QQmlPropertyData::writeProperty
    (this=<optimized out>, target=<optimized out>, value=<optimized out>, flags=...)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlpropertydata_p.h:429
#5  0x00007ffff5de7335 in QObjectPointerBinding::compareAndSet<QObjectPointerBinding::write(QV4::Value const&, bool, QFlags<QQmlPropertyData::WriteFlag>)::{lambda()#1}>(QQmlMetaObject const&, QObject*, QQmlPropertyData const*, QFlags<QQmlPropertyData::WriteFlag>, QObjectPointerBinding::write(QV4::Value const&, bool, QFlags<QQmlPropertyData::WriteFlag>)::{lambda()#1} const&)
    (this=<optimized out>, resultMo=<optimized out>, resultObject=<optimized out>, pd=<optimized out>, flags=..., slowWrite=<optimized out>) at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlbinding.cpp:856
#6  QObjectPointerBinding::write (this=0x55555d3b9fc0, result=..., isUndefined=<optimized out>, flags=...)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlbinding.cpp:834
#7  0x00007ffff5de9e05 in QQmlBinding::doUpdate (this=0x55555d3b9fc0, watcher=..., flags=..., scope=...)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlbinding.cpp:716
#8  0x00007ffff5de8c6d in QQmlBinding::update (this=0x55555d3b9fc0, flags=...)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlbinding.cpp:166
#9  0x00007ffff5e91e58 in QQmlObjectCreator::finalize (this=0x55555cb913e0, interrupt=...)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlobjectcreator.cpp:1551
#10 0x00007ffff5e5498f in QQmlIncubatorPrivate::incubate (this=this@entry=0x55555d3a3600, i=...)
    at /usr/include/qt6/QtCore/qscopedpointer.h:91
#11 0x00007ffff5e55498 in QQmlEnginePrivate::incubate (this=0x555559b58530, i=<optimized out>, forContext=<optimized out>)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlincubator.cpp:56
#12 0x00007ffff5e0d86f in QQmlComponent::create (this=<optimized out>, incubator=..., context=<optimized out>, 
    context@entry=0x55555d3a2ef0, forContext=forContext@entry=0x0)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlcomponent.cpp:1585
#13 0x00007ffff6c629f0 in QQuickLoaderPrivate::_q_sourceLoaded (this=0x55555c73bc40)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/quick/items/qquickloader.cpp:729
#14 0x00007ffff5e92384 in QQmlObjectCreator::finalize (this=0x555559e64d80, interrupt=...)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlobjectcreator.cpp:1616
#15 0x00007ffff5e02a65 in QQmlComponentPrivate::complete (enginePriv=0x555559b58530, state=state@entry=0x55555c1ab690)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/ftw/qbipointer_p.h:134
#16 0x00007ffff5e0520c in QQmlComponentPrivate::completeCreate (this=0x55555c1ab610)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlcomponent.cpp:1345
#17 0x00007ffff5e068d5 in QQmlComponent::completeCreate (this=0x55555c1aae00)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlcomponent.cpp:1307
#18 QQmlComponentPrivate::createWithProperties
    (this=0x55555c1ab610, parent=<optimized out>, properties=..., context=<optimized out>, behavior=QQmlComponentPrivate::CreateDefault, createFromQml=<optimized out>)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlcomponent.cpp:999
#19 0x00007ffff5de7cfb in QQmlComponent::create (this=0x55555c1aae00, context=0x0)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlcomponent.cpp:939
#20 QQmlApplicationEnginePrivate::finishLoad (this=0x555559b58530, c=0x55555c1aae00)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlapplicationengine.cpp:159
#21 0x00007ffff5de7f9c in QQmlApplicationEnginePrivate::ensureLoadingFinishes (this=<optimized out>, c=<optimized out>)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlapplicationengine.cpp:186
#22 0x00007ffff5de803b in QQmlApplicationEnginePrivate::startLoad
    (this=<optimized out>, url=<optimized out>, data=..., dataFlag=<optimized out>)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlapplicationengine.cpp:113
#23 0x00007ffff5de80aa in QQmlApplicationEngine::load (this=this@entry=0x555559e40370, url=...)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlapplicationengine.cpp:372
#24 0x0000555555faf584 in mu::app::GuiApp::perform (this=<optimized out>)
    at /usr/src/debug/musescore/MuseScore/src/app/internal/guiapp.cpp:277
#25 0x0000555555a631e1 in main (argc=<optimized out>, argv=<optimized out>)
    at /usr/src/debug/musescore/MuseScore/src/app/main.cpp:217
(gdb) 
#0  0x00007fffa5a10a26 in QQuickScrollBarPrivate::setPosition
    (this=0x55555d3bf3c0, newPosition=0.5, notifyVisualChange=notifyVisualChange@entry=true)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/quicktemplates/qquickscrollbar.cpp:479
#1  0x00007fffa5a16190 in QQuickScrollBar::setPosition (this=0x55555d3bf2e0, position=<optimized out>)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/quicktemplates/qquickscrollbar.cpp:457
#2  QQuickScrollBarAttachedPrivate::initVertical (this=this@entry=0x55555d3b9970)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/quicktemplates/qquickscrollbar.cpp:1025
#3  0x00007fffa5a167ef in QQuickScrollBarAttached::setVertical (this=0x55555d3a80e0, vertical=0x55555d3bf2e0)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/quicktemplates/qquickscrollbar.cpp:1318
#4  0x00007ffff5dcf08b in QQmlPropertyData::writeProperty
    (this=<optimized out>, target=<optimized out>, value=<optimized out>, flags=...)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlpropertydata_p.h:429
#5  0x00007ffff5de7335 in QObjectPointerBinding::compareAndSet<QObjectPointerBinding::write(QV4::Value const&, bool, QFlags<QQmlPropertyData::WriteFlag>)::{lambda()#1}>(QQmlMetaObject const&, QObject*, QQmlPropertyData const*, QFlags<QQmlPropertyData::WriteFlag>, QObjectPointerBinding::write(QV4::Value const&, bool, QFlags<QQmlPropertyData::WriteFlag>)::{lambda()#1} const&)
    (this=<optimized out>, resultMo=<optimized out>, resultObject=<optimized out>, pd=<optimized out>, flags=..., slowWrite=<optimized out>) at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlbinding.cpp:856
#6  QObjectPointerBinding::write (this=0x55555d3b9fc0, result=..., isUndefined=<optimized out>, flags=...)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlbinding.cpp:834
#7  0x00007ffff5de9e05 in QQmlBinding::doUpdate (this=0x55555d3b9fc0, watcher=..., flags=..., scope=...)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlbinding.cpp:716
#8  0x00007ffff5de8c6d in QQmlBinding::update (this=0x55555d3b9fc0, flags=...)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlbinding.cpp:166
#9  0x00007ffff5e91e58 in QQmlObjectCreator::finalize (this=0x55555cb913e0, interrupt=...)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlobjectcreator.cpp:1551
#10 0x00007ffff5e5498f in QQmlIncubatorPrivate::incubate (this=this@entry=0x55555d3a3600, i=...)
    at /usr/include/qt6/QtCore/qscopedpointer.h:91
#11 0x00007ffff5e55498 in QQmlEnginePrivate::incubate (this=0x555559b58530, i=<optimized out>, forContext=<optimized out>)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlincubator.cpp:56
#12 0x00007ffff5e0d86f in QQmlComponent::create (this=<optimized out>, incubator=..., context=<optimized out>, 
    context@entry=0x55555d3a2ef0, forContext=forContext@entry=0x0)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlcomponent.cpp:1585
#13 0x00007ffff6c629f0 in QQuickLoaderPrivate::_q_sourceLoaded (this=0x55555c73bc40)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/quick/items/qquickloader.cpp:729
#14 0x00007ffff5e92384 in QQmlObjectCreator::finalize (this=0x555559e64d80, interrupt=...)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlobjectcreator.cpp:1616
#15 0x00007ffff5e02a65 in QQmlComponentPrivate::complete (enginePriv=0x555559b58530, state=state@entry=0x55555c1ab690)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/ftw/qbipointer_p.h:134
#16 0x00007ffff5e0520c in QQmlComponentPrivate::completeCreate (this=0x55555c1ab610)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlcomponent.cpp:1345
#17 0x00007ffff5e068d5 in QQmlComponent::completeCreate (this=0x55555c1aae00)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlcomponent.cpp:1307
#18 QQmlComponentPrivate::createWithProperties
    (this=0x55555c1ab610, parent=<optimized out>, properties=..., context=<optimized out>, behavior=QQmlComponentPrivate::CreateDefault, createFromQml=<optimized out>)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlcomponent.cpp:999
#19 0x00007ffff5de7cfb in QQmlComponent::create (this=0x55555c1aae00, context=0x0)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlcomponent.cpp:939
#20 QQmlApplicationEnginePrivate::finishLoad (this=0x555559b58530, c=0x55555c1aae00)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlapplicationengine.cpp:159
#21 0x00007ffff5de7f9c in QQmlApplicationEnginePrivate::ensureLoadingFinishes (this=<optimized out>, c=<optimized out>)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlapplicationengine.cpp:186
#22 0x00007ffff5de803b in QQmlApplicationEnginePrivate::startLoad
    (this=<optimized out>, url=<optimized out>, data=..., dataFlag=<optimized out>)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlapplicationengine.cpp:113
#23 0x00007ffff5de80aa in QQmlApplicationEngine::load (this=this@entry=0x555559e40370, url=...)
    at /usr/src/debug/qt6-declarative/qtdeclarative/src/qml/qml/qqmlapplicationengine.cpp:372
#24 0x0000555555faf584 in mu::app::GuiApp::perform (this=<optimized out>)
    at /usr/src/debug/musescore/MuseScore/src/app/internal/guiapp.cpp:277
#25 0x0000555555a631e1 in main (argc=<optimized out>, argv=<optimized out>)
    at /usr/src/debug/musescore/MuseScore/src/app/main.cpp:217

[MarcSabatella]

If you're seeing some sort of crash on Linux, that is most likely unrelated and something unique to your system, just as the OP's crash is unique to their system. To be clear, the app .ost certainly works in general. So the trick will be to determine what I'm questioning aspect of your systems are causing the crashes.

@reactormonk please open a new issue and provide precise steps to reproduce the problem and more information on your system. It appears the crash you are seeing might possibly relate to accessibility, so be sure to say if you are running any accessibility tools. Also be sure you are running the latest version (4.6.5), with the official AppImage build and not any sort of unsupported third party build.

If this is your own build from source, then the problem most likely stems from not having a correct build environment set up (which is also why so many third party builds also fail). So be sure to follow the instructions to the letter.