Crashed Thread: 0 Dispatch queue: com.apple.main-thread Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: EXC_I386_GPFLT Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 net.sourceforge.mscore 0x000000010cffcaca std::__1::__tree_node_base const* std::__1::__tree_next const*>(std::__1::__tree_node_base const*) + 42 (__tree:133) 1 net.sourceforge.mscore 0x000000010d102c19 Ms::Seq::heartBeatTimeout() + 2441 (__tree:735) 2 net.sourceforge.mscore 0x000000010cee2138 Ms::Seq::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) + 248 (moc_seq.cpp:121) 3 QtCore 0x000000010ea8f591 QMetaObject::activate(QObject*, int, int, void**) + 2593 4 QtCore 0x000000010ea882f3 QObject::event(QEvent*) + 51 5 QtWidgets 0x0000000110333077 QApplicationPrivate::notify_helper(QObject*, QEvent*) + 311 6 QtWidgets 0x0000000110336869 QApplication::notify(QObject*, QEvent*) + 9897 7 QtCore 0x000000010ea6059e QCoreApplication::notifyInternal(QObject*, QEvent*) + 110 8 QtCore 0x000000010eaaa383 QTimerInfoList::activateTimers() + 1027 9 libqcocoa.dylib 0x0000000114573c85 0x11455e000 + 89221 10 com.apple.CoreFoundation 0x00007fff8ceff101 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 11 com.apple.CoreFoundation 0x00007fff8cefea25 __CFRunLoopDoSources0 + 245 12 com.apple.CoreFoundation 0x00007fff8cf21dc5 __CFRunLoopRun + 789 13 com.apple.CoreFoundation 0x00007fff8cf216b2 CFRunLoopRunSpecific + 290 14 com.apple.HIToolbox 0x00007fff873690a4 RunCurrentEventLoopInMode + 209 15 com.apple.HIToolbox 0x00007fff87368e42 ReceiveNextEventCommon + 356 16 com.apple.HIToolbox 0x00007fff87368cd3 BlockUntilNextEventMatchingListInMode + 62 17 com.apple.AppKit 0x00007fff859cc613 _DPSNextEvent + 685 18 com.apple.AppKit 0x00007fff859cbed2 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 128 19 com.apple.AppKit 0x00007fff859c3283 -[NSApplication run] + 517 20 libqcocoa.dylib 0x000000011457452b 0x11455e000 + 91435 21 QtCore 0x000000010ea5da33 QEventLoop::exec(QFlags) + 403 22 QtCore 0x000000010ea60b25 QCoreApplication::exec() + 357 23 net.sourceforge.mscore 0x000000010d072500 main + 17392 (musescore.cpp:4941) 24 net.sourceforge.mscore 0x000000010ced99c4 start + 52