"QtQuick" plugin "qtquick2plugin" not found in MacOS C++ app using Qt5.15.2

SGaist

Sorry, I thought you were saying the installer issue was fixed.

Hence my request to reproduce your issue with a minimal example, that will allow to check what is going on on macOS.

veryqtperson

I've gotten the same problem with my static build of Qt 5.15.2.

The solution in my case (using CMake) was to call qt5_import_qml_plugins:

get_target_property(QT_TARGET_TYPE Qt5::Core TYPE)
if(${QT_TARGET_TYPE} STREQUAL "STATIC_LIBRARY")
    find_package(Qt5QmlImportScanner REQUIRED)
    qt5_import_qml_plugins(${CMAKE_PROJECT_NAME})
endif()

Not sure what is the equivalent in Qt 6, haven't tested it myself and can't find qt6_import_qml_plugins in documentation.

Anyway, qt5_import_qml_plugins is available only from Qt 5.14(?), so for older versions the alternative would be this external module.