[solved] My app crashed after using macdeployqt (Qt5.2 RC 1)

gaojinhsu

At first, I built my app with Qt5.1.1, but I got rejected by the Mac App Store because of QWebKit( I was told my app was using non-public API), I heard of Qt5.2 RC1 using QML/Quick/Webkit/Network/etc got accepted into Mac App Store, so I rebuilt my project with Qt5.2 RC1, everything goes fine until deploying my app, my app would crash when I tried to launch it after using macdeployqt tool.

here is the information after using "otool -L":
/usr/lib/libz.1.dylib (compatibility version 1.0.0, current version 1.2.5)
@executable_path/../Frameworks/QtWebKitWidgets.framework/Versions/5/QtWebKitWidgets (compatibility version 5.2.0, current version 5.2.0)
@executable_path/../Frameworks/QtQuick.framework/Versions/5/QtQuick (compatibility version 5.2.0, current version 5.2.0)
@executable_path/../Frameworks/QtQml.framework/Versions/5/QtQml (compatibility version 5.2.0, current version 5.2.0)
@executable_path/../Frameworks/QtNetwork.framework/Versions/5/QtNetwork (compatibility version 5.2.0, current version 5.2.0)
@executable_path/../Frameworks/QtCore.framework/Versions/5/QtCore (compatibility version 5.2.0, current version 5.2.0)
/System/Library/Frameworks/Foundation.framework/Versions/C/Foundation (compatibility version 300.0.0, current version 1056.0.0)
@executable_path/../Frameworks/QtGui.framework/Versions/5/QtGui (compatibility version 5.2.0, current version 5.2.0)
@executable_path/../Frameworks/QtMultimediaWidgets.framework/Versions/5/QtMultimediaWidgets (compatibility version 5.2.0, current version 5.2.0)
@executable_path/../Frameworks/QtMultimedia.framework/Versions/5/QtMultimedia (compatibility version 5.2.0, current version 5.2.0)
@executable_path/../Frameworks/QtWidgets.framework/Versions/5/QtWidgets (compatibility version 5.2.0, current version 5.2.0)
@executable_path/../Frameworks/QtOpenGL.framework/Versions/5/QtOpenGL (compatibility version 5.2.0, current version 5.2.0)
@executable_path/../Frameworks/QtPrintSupport.framework/Versions/5/QtPrintSupport (compatibility version 5.2.0, current version 5.2.0)
/System/Library/Frameworks/Cocoa.framework/Versions/A/Cocoa (compatibility version 1.0.0, current version 20.0.0)
@executable_path/../Frameworks/QtWebKit.framework/Versions/5/QtWebKit (compatibility version 5.2.0, current version 5.2.0)
@executable_path/../Frameworks/QtSql.framework/Versions/5/QtSql (compatibility version 5.2.0, current version 5.2.0)
@executable_path/../Frameworks/QtSensors.framework/Versions/5/QtSensors (compatibility version 5.2.0, current version 5.2.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1197.1.1)
@executable_path/../Frameworks/QtScript.framework/Versions/5/QtScript (compatibility version 5.2.0, current version 5.2.0)
/System/Library/Frameworks/OpenGL.framework/Versions/A/OpenGL (compatibility version 1.0.0, current version 1.0.0)
/System/Library/Frameworks/AGL.framework/Versions/A/AGL (compatibility version 1.0.0, current version 1.0.0)
/usr/lib/libstdc++.6.dylib (compatibility version 7.0.0, current version 60.0.0)
/usr/lib/libobjc.A.dylib (compatibility version 1.0.0, current version 228.0.0)

gaojinhsu

One more interesting thing, since Qt5.2 release was published two days ago, I tried to rebuilt my project with Qt5.2 release, but failed!! the errors:
1.symbol(s) not found for architecture x86_64
2.linker command failed with exit code 1 (use -v to see invocation)

SGaist

Hi,

What does the report say ? Also what do you have printed if you start it from the command line ?

gaojinhsu

When I start my app from command line:
LSOpenURLsWithRole() failed with error -10810 for the file /MyDirectory/Myapp.app.

and here is part of the report:
Date/Time: 2013-12-13 16:45:39.060 +0800
OS Version: Mac OS X 10.9 (13A603)
Report Version: 11
Anonymous UUID: 6083922E-421B-65E7-34C5-24B22727FFD6

Sleep/Wake UUID: 3056C3B2-94DB-4833-8992-A0A1E850C71A

Crashed Thread: 0 Dispatch queue: com.apple.main-thread

Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000

Application Specific Information:
abort() called

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x00007fff8a6b3866 __pthread_kill + 10
1 libsystem_pthread.dylib 0x00007fff9156f35c pthread_kill + 92
2 libsystem_c.dylib 0x00007fff8fd0cbba abort + 125
3 QtCore 0x0000000110a6fc59 0x110a55000 + 109657
4 QtCore 0x0000000110a70291 QMessageLogger::fatal(char const*, ...) const + 161
5 QtGui 0x0000000110ffaafd QGuiApplicationPrivate::createPlatformIntegration() + 4349
6 QtGui 0x0000000110ffab1b QGuiApplicationPrivate::createEventDispatcher() + 27
7 QtCore 0x0000000110c679c8 QCoreApplication::init() + 104
8 QtCore 0x0000000110c67937 QCoreApplication::QCoreApplication(QCoreApplicationPrivate&) + 39
9 QtGui 0x0000000110ff8a2e QGuiApplication::QGuiApplication(QGuiApplicationPrivate&) + 14
10 QtWidgets 0x000000011153b3ce QApplication::QApplication(int&, char**, int) + 206
11 com.yourcompany.1Checker 0x000000010fc1d0f7 main + 39
12 libdyld.dylib 0x00007fff943ba5fd start + 1

Thread 1:
0 libsystem_kernel.dylib 0x00007fff8a6b3e6a __workq_kernreturn + 10
1 libsystem_pthread.dylib 0x00007fff9156ff08 _pthread_wqthread + 330
2 libsystem_pthread.dylib 0x00007fff91572fb9 start_wqthread + 13

btw, I have followed you on twitter, : )

[quote author="SGaist" date="1386922409"]Hi,

What does the report say ? Also what do you have printed if you start it from the command line ?[/quote]

SGaist

Check what the application permissions are, specifically the executable flag

gaojinhsu

-rwxr-xr-x 1 gint_develop staff 4731256 Dec 16 13:50 Myapp.app/Contents/MacOS/Myapp

[quote author="SGaist" date="1386927636"]Check what the application permissions are, specifically the executable flag[/quote]

SGaist

The bundle also ?

gaojinhsu

Myapp.app:

drwxr-xr-x 8

and I run my app on shell:

QEventLoop: Cannot be used without QApplication
QObject::moveToThread: Current thread (0x103c02330) is not the object's thread (0x103d17fa0).
Cannot move to target thread (0x103c02330)

On Mac OS X, you might be loading two sets of Qt binaries into the same process. Check that all plugins are compiled against the right Qt binaries. Export DYLD_PRINT_LIBRARIES=1 and check that only one set of binaries are being loaded.
QObject::moveToThread: Current thread (0x103c02330) is not the object's thread (0x103d17fa0).
Cannot move to target thread (0x103c02330)

On Mac OS X, you might be loading two sets of Qt binaries into the same process. Check that all plugins are compiled against the right Qt binaries. Export DYLD_PRINT_LIBRARIES=1 and check that only one set of binaries are being loaded.
QEventLoop: Cannot be used without QApplication
QEventLoop: Cannot be used without QApplication
objc[14722]: Class NotificationReceiver is implemented in both /Users/gint_develop/Documents/maserati/branches/build-OneChecker-Desktop_Qt_5_2_0_clang_64bit-Release/OneChecker/1Checker.app/Contents/Frameworks/QtWidgets.framework/Versions/5/QtWidgets and /Users/gint_develop/Qt5.2.0/5.2.0/clang_64/lib/QtWidgets.framework/Versions/5/QtWidgets. One of the two will be used. Which one is undefined.
objc[14722]: Class QCocoaPageLayoutDelegate is implemented in both /Users/gint_develop/Documents/maserati/branches/build-OneChecker-Desktop_Qt_5_2_0_clang_64bit-Release/OneChecker/1Checker.app/Contents/Frameworks/QtPrintSupport.framework/Versions/5/QtPrintSupport and /Users/gint_develop/Qt5.2.0/5.2.0/clang_64/lib/QtPrintSupport.framework/Versions/5/QtPrintSupport. One of the two will be used. Which one is undefined.
objc[14722]: Class QCocoaPrintPanelDelegate is implemented in both /Users/gint_develop/Documents/maserati/branches/build-OneChecker-Desktop_Qt_5_2_0_clang_64bit-Release/OneChecker/1Checker.app/Contents/Frameworks/QtPrintSupport.framework/Versions/5/QtPrintSupport and /Users/gint_develop/Qt5.2.0/5.2.0/clang_64/lib/QtPrintSupport.framework/Versions/5/QtPrintSupport. One of the two will be used. Which one is undefined.
QObject::moveToThread: Current thread (0x103c02330) is not the object's thread (0x103d17fa0).
Cannot move to target thread (0x103c02330)

On Mac OS X, you might be loading two sets of Qt binaries into the same process. Check that all plugins are compiled against the right Qt binaries. Export DYLD_PRINT_LIBRARIES=1 and check that only one set of binaries are being loaded.
This application failed to start because it could not find or load the Qt platform plugin "cocoa".

Available platform plugins are: cocoa, minimal, offscreen.

Reinstalling the application may fix this problem.
Abort trap: 6

SGaist

Check also the plugins/dependencies with otool. There's something that is pulling your system's Qt rather than the one bundled with your application

gaojinhsu

I checked all the frameworks and plugins, nothing was referencing my local Qt on my system, that's why I think it's weird.

[quote author="SGaist" date="1387268642"]Check also the plugins/dependencies with otool. There's something that is pulling your system's Qt rather than the one bundled with your application[/quote]

SGaist

Did you also check what

@DYLD_PRINT_LIBRARIES=1./MyDirectory/Myapp.app/Contents/MacOS/Myapp@

returns ?

gaojinhsu

It seems macdeployqt tool didn't copy libqcorewlanbearer.dylib and libqgenericbearer.dylib files into the bundle, now I did that by hand and changed their dependency, but how to tell the app to use the .dylib files in the bundle

QEventLoop: Cannot be used without QApplication
dyld: loaded: /Users/username/Qt5.2.0/5.2.0/clang_64/plugins/bearer/libqcorewlanbearer.dylib
dyld: loaded: /System/Library/Frameworks/CoreWLAN.framework/Versions/A/CoreWLAN
dyld: loaded: /Users/username/Qt5.2.0/5.2.0/clang_64/lib/QtNetwork.framework/Versions/5/QtNetwork
dyld: loaded: /Users/username/Qt5.2.0/5.2.0/clang_64/lib/QtCore.framework/Versions/5/QtCore
dyld: loaded: /usr/lib/libpcap.A.dylib
dyld: loaded: /System/Library/Frameworks/CoreWiFi.framework/Versions/A/CoreWiFi
QObject::moveToThread: Current thread (0x103c05300) is not the object's thread (0x103d133e0).
Cannot move to target thread (0x103c05300)

On Mac OS X, you might be loading two sets of Qt binaries into the same process. Check that all plugins are compiled against the right Qt binaries. Export DYLD_PRINT_LIBRARIES=1 and check that only one set of binaries are being loaded.
dyld: loaded: /Users/username/Qt5.2.0/5.2.0/clang_64/plugins/bearer/libqgenericbearer.dylib
QObject::moveToThread: Current thread (0x103c05300) is not the object's thread (0x103d133e0).
Cannot move to target thread (0x103c05300)

On Mac OS X, you might be loading two sets of Qt binaries into the same process. Check that all plugins are compiled against the right Qt binaries. Export DYLD_PRINT_LIBRARIES=1 and check that only one set of binaries are being loaded.
QEventLoop: Cannot be used without QApplication
QEventLoop: Cannot be used without QApplication
dyld: loaded: /Users/username/Qt5.2.0/5.2.0/clang_64/plugins/platforms/libqcocoa.dylib
dyld: loaded: /Users/username/Qt5.2.0/5.2.0/clang_64/lib/QtPrintSupport.framework/Versions/5/QtPrintSupport
dyld: loaded: /Users/username/Qt5.2.0/5.2.0/clang_64/lib/QtWidgets.framework/Versions/5/QtWidgets
dyld: loaded: /Users/username/Qt5.2.0/5.2.0/clang_64/lib/QtGui.framework/Versions/5/QtGui
objc[25913]: Class NotificationReceiver is implemented in both /Users/username/Documents/maserati/branches/build-OneChecker-Desktop_Qt_5_2_0_clang_64bit-Release/OneChecker/1Checker.app/Contents/Frameworks/QtWidgets.framework/Versions/5/QtWidgets and /Users/username/Qt5.2.0/5.2.0/clang_64/lib/QtWidgets.framework/Versions/5/QtWidgets. One of the two will be used. Which one is undefined.

SGaist

You seem to also have the platforms plugins loaded from your installed Qt

gaojinhsu

yeah,
1） macdeployqt tool copied platforms plugins into the bundle,but my app still loaded them from my installed Qt
2）macdeployqt tool didn’t copy libqcorewlanbearer.dylib and libqgenericbearer.dylib files into the bundle

so it's qt's bug? how to fix it ? I have copied libqcorewlanbearer.dylib and libqgenericbearer.dylib files into the bundle by hand and changed their dependency, how to make my app load the .dylib files in the bundle ?

[quote author="SGaist" date="1387355148"]You seem to also have the platforms plugins loaded from your installed Qt[/quote]

SGaist

I would go with otool on each and every library and verify that the dependencies all point to @executable_path/../Frameworks/THE_Qt_FRAMEWORK and also verify the library IDs

gaojinhsu

Thanks for your advice, but the point is frameworks and executable flag don't reference the plugins directly , so how can i know which one is referencing the plugins? I think my app loads right frameworks but wrong plugins. and otool can get information of frameworks reference only

SGaist

That's what DYLD_PRINT_LIBRARIES=1 helps you find, you can also guess a bit knowing what you are using in your software (image formats, printing, networking etc…)

gaojinhsu

well, let me describe it in this way,
all the plugins my app needs are in the bundle, but app still loads the plugins installed on my system at run-time. And thanks again for your patience.

gaojinhsu

for example, libqcorewlanbearer.dylib is in the bundle, the following is the "otool -L" information

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/Users/gint_develop/Desktop/1Checker.app/Contents/PlugIns/bearer/libqcorewlanbearer.dylib:
libqcorewlanbearer.dylib (compatibility version 0.0.0, current version 0.0.0)
/System/Library/Frameworks/Foundation.framework/Versions/C/Foundation (compatibility version 300.0.0, current version 945.16.0)
/System/Library/Frameworks/SystemConfiguration.framework/Versions/A/SystemConfiguration (compatibility version 1.0.0, current version 453.19.0)
/System/Library/Frameworks/CoreWLAN.framework/Versions/A/CoreWLAN (compatibility version 1.0.0, current version 1.0.0)
/System/Library/Frameworks/Security.framework/Versions/A/Security (compatibility version 1.0.0, current version 55179.11.0)
@executable_path/../Frameworks/QtNetwork.framework/Versions/5/QtNetwork (compatibility version 5.2.0, current version 5.2.0)
@executable_path/../Frameworks/QtCore.framework/Versions/5/QtCore (compatibility version 5.2.0, current version 5.2.0)
/usr/lib/libstdc++.6.dylib (compatibility version 7.0.0, current version 56.0.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 169.3.0)
/usr/lib/libobjc.A.dylib (compatibility version 1.0.0, current version 228.0.0)
/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 744.18.0)
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

but when I use "DYLD_PRINT_LIBRARIES=1", I find the app loaded a wrong libqcorewlanbearer.dylib and its dependencies.

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
dyld: loaded: /Users/gint_develop/Qt5.2.0/5.2.0/clang_64/plugins/bearer/libqcorewlanbearer.dylib
dyld: loaded: /System/Library/Frameworks/CoreWLAN.framework/Versions/A/CoreWLAN
dyld: loaded: /Users/gint_develop/Qt5.2.0/5.2.0/clang_64/lib/QtNetwork.framework/Versions/5/QtNetwork
dyld: loaded: /Users/gint_develop/Qt5.2.0/5.2.0/clang_64/lib/QtCore.framework/Versions/5/QtCore
dyld: loaded: /usr/lib/libpcap.A.dylib
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
you can get my bundle "here":https://drive.google.com/uc?id=0B0lyTclIaUOPOUI4MmpZaHZiN3c&export=download

SGaist

Ok… There might be something funky with qt.conf's usage, I tried to start your application setting QT_PLUGIN_PATH to point to your bundle plugin path and it's working fine.

Have a look at the Mac Deployment Documentation, they explain how to add the path to the bundle plugin directory when starting your application, that should workaround your current problem

gaojinhsu

I have viewed the docment, and I think the content of my qt.conf file is right, it does point to my bundle plugin path. : (

SGaist

I think it is (or at least I don't see any reason right now that it would not be)

That's why I suggested to use the addLibraryPath() technique in between

gaojinhsu

then I added the following code to main.cpp, didn't work at all.

QDir dir(QApplication::applicationDirPath());

qDebug()<<dir.absolutePath();

dir.cdUp();

 qDebug()<<dir.absolutePath();

dir.cd("PlugIns");

qDebug()<<dir.absolutePath();

QCoreApplication::addLibraryPath(dir.absolutePath());

SGaist

And if you use setLibraryPath ?

gaojinhsu

Like this? it doesn't work either.

QDir dir(QApplication::applicationDirPath());
qDebug()<<dir.absolutePath();
dir.cdUp();
qDebug()<<dir.absolutePath();
dir.cd("PlugIns");
qDebug()<<dir.absolutePath();
QApplication::setLibraryPaths(QStringList(dir.absolutePath()));

gaojinhsu

And we shouldn't forget this, maybe it's a important clue.
the macdeployqt tool even didn't copy the plugins into the bundle at the first time, I did this by hand. And later the app loaded them incorrectly no matter how I modify the Path in qt.conf file or in source code.

SGaist

In between, did you update to 5.2 since it's been officially released ?

gaojinhsu

Actually, it is 5.2 already...

gaojinhsu

how do you set QT_PLUGIN_PATH ? show me plz.
[quote author="SGaist" date="1387459417"]Ok… There might be something funky with qt.conf's usage, I tried to start your application setting QT_PLUGIN_PATH to point to your bundle plugin path and it's working fine.

Have a look at the Mac Deployment Documentation, they explain how to add the path to the bundle plugin directory when starting your application, that should workaround your current problem[/quote]

SGaist

QT_PLUGIN_PATH=/Users/username/Downloads/1Checker.app/Contents/PlugIns/ ./1Checker.app/Contents/MacOS/1Checker

gaojinhsu

type it into terminal ? it still doesn't work...

gaojinhsu

are you sure it is working fine after setting QT_PLUGIN_PATH to point to your bundle plugin path , I
This is my QT_PLUGIN_PATH, but my app is yet to be launched.
//////////////////////////////////////////////////////////////////
gint-developtekiMacBook-Pro:~ gint_develop$ echo $QT_PLUGIN_PATH
/Users/gint_develop/Desktop/1Checker.app/Contents/MacOS/1Checker

SGaist

you can try with:
@ export QT_PLUGIN_PATH=/Users/username/Downloads/1Checker.app/Contents/PlugIns/
@
then
@
./1Checker.app/Contents/MacOS/1Checker
@

I have three warnings about QEventLoop but I can see your application login screen

gaojinhsu

@gint-developtekiMacBook-Pro:~ gint_develop$ export QT_PLUGIN_PATH="/Users/gint_develop/Desktop/1Checker.app/Contents/PlugIns"
gint-developtekiMacBook-Pro:~ gint_develop$ cd ~/Desktop/
gint-developtekiMacBook-Pro:Desktop gint_develop$ ./1Checker.app/Contents/MacOS/1Checker
QEventLoop: Cannot be used without QApplication
QObject::moveToThread: Current thread (0x103e079f0) is not the object's thread (0x103e0c800).
Cannot move to target thread (0x103e079f0)

On Mac OS X, you might be loading two sets of Qt binaries into the same process. Check that all plugins are compiled against the right Qt binaries. Export DYLD_PRINT_LIBRARIES=1 and check that only one set of binaries are being loaded.
QObject::moveToThread: Current thread (0x103e079f0) is not the object's thread (0x103e0c800).
Cannot move to target thread (0x103e079f0)

On Mac OS X, you might be loading two sets of Qt binaries into the same process. Check that all plugins are compiled against the right Qt binaries. Export DYLD_PRINT_LIBRARIES=1 and check that only one set of binaries are being loaded.
QEventLoop: Cannot be used without QApplication
QEventLoop: Cannot be used without QApplication
objc[3729]: Class NotificationReceiver is implemented in both /Users/gint_develop/Desktop/1Checker.app/Contents/Frameworks/QtWidgets.framework/Versions/5/QtWidgets and /Users/gint_develop/Qt5.2.0/5.2.0/clang_64/lib/QtWidgets.framework/Versions/5/QtWidgets. One of the two will be used. Which one is undefined.
objc[3729]: Class QCocoaPageLayoutDelegate is implemented in both /Users/gint_develop/Desktop/1Checker.app/Contents/Frameworks/QtPrintSupport.framework/Versions/5/QtPrintSupport and /Users/gint_develop/Qt5.2.0/5.2.0/clang_64/lib/QtPrintSupport.framework/Versions/5/QtPrintSupport. One of the two will be used. Which one is undefined.
objc[3729]: Class QCocoaPrintPanelDelegate is implemented in both /Users/gint_develop/Desktop/1Checker.app/Contents/Frameworks/QtPrintSupport.framework/Versions/5/QtPrintSupport and /Users/gint_develop/Qt5.2.0/5.2.0/clang_64/lib/QtPrintSupport.framework/Versions/5/QtPrintSupport. One of the two will be used. Which one is undefined.
QObject::moveToThread: Current thread (0x103e079f0) is not the object's thread (0x103e0c800).
Cannot move to target thread (0x103e079f0)

On Mac OS X, you might be loading two sets of Qt binaries into the same process. Check that all plugins are compiled against the right Qt binaries. Export DYLD_PRINT_LIBRARIES=1 and check that only one set of binaries are being loaded.
This application failed to start because it could not find or load the Qt platform plugin "cocoa".

Available platform plugins are: cocoa, minimal, offscreen.

Reinstalling the application may fix this problem.
Abort trap: 6@

SGaist

If you rename your Qt folder does it also fail ?

gaojinhsu

I have tried these:

set QT_PLUGIN_PATH and rename Qt folder, succeed to launch it with terminal, but failed by double clicking.
set QT_PLUGIN_PATH and do not rename Qt folder, both failed.
do not set QT_PLUGIN_PATH and rename Qt folder, both failed.

so I think even if I set QT_PLUGIN_PATH, the reference pointing to the Qt folder is the preference.

SGaist

Are you using QDir::currentPath ?

gaojinhsu

no, but the following code has been added to main.cpp already,

@int main(int argc, char *argv[])
{

QApplication a(argc, argv);

QDir dir(QCoreApplication::applicationDirPath());
qDebug()<<dir.absolutePath();
dir.cdUp();
qDebug()<<dir.absolutePath();
dir.cd("PlugIns");
qDebug()<<dir.absolutePath();
QApplication::setLibraryPaths(QStringList(dir.absolutePath()));
qDebug()<<QCoreApplication::libraryPaths();@

and the relevant application output

@"/Users/gint_develop/Documents/maserati/branches/build-OneChecker-Desktop_Qt_5_2_0_clang_64bit-Release/OneChecker/1Checker.app/Contents/MacOS"
"/Users/gint_develop/Documents/maserati/branches/build-OneChecker-Desktop_Qt_5_2_0_clang_64bit-Release/OneChecker/1Checker.app/Contents"
"/Users/gint_develop/Documents/maserati/branches/build-OneChecker-Desktop_Qt_5_2_0_clang_64bit-Release/OneChecker/1Checker.app/Contents/PlugIns"
("/Users/gint_develop/Documents/maserati/branches/build-OneChecker-Desktop_Qt_5_2_0_clang_64bit-Release/OneChecker/1Checker.app/Contents/PlugIns") @

gaojinhsu

Also, Here is another important clue,
@This application failed to start because it could not find or load the Qt platform plugin "cocoa".@
maybe the reference pointing to the platform plugin in the bundle is broken, and QCoreApplication::libraryPaths() is not used to search for platform plugins , as" what he said":https://bugreports.qt-project.org/browse/QTBUG-29503

SGaist

Can you build Qt from sources and use this one to create your application ? I didn't have that problem with a current git build

Important: Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

[solved] My app crashed after using macdeployqt (Qt5.2 RC 1)