I would like to use a QGIS custom widget in a UI window on Qt Designer for Mac. I only have the Qt widgets and cannot find a way to see the QGIS widgets.
I have Mac OS Mojave 10.14.6, Qt Creator 4.11 (based on Qt 5.14.1), Qt Designer 5.9.6, QGIS 3.10 and of course python 3, Qt, PyQt.
I already saw the answers on No custom widgets in Qt Designer for QGIS 3 but:
Most answers apply to MS-Windows. Thus I have no .exe or .bat with the designer. I cannot find a similar designer executable in the QGIS Mac package.
The promote of http://www.informit.com/articles/article.aspx?p=1405227&seqNum=3 works of course, but I don't benefit from the custom properties of the widget. It is not very convenient to define them in the code.
The plugin approach of http://www.informit.com/articles/article.aspx?p=1405227&seqNum=3 is ways too complicated ... and I expect that QGIS did it already, seeing the designer for MS-Windows.
I try to add some path in Qt Designer preferences (template paths) to /Applications/QGIS3.10.app/Contents/Frameworks/QtDesigner.framework/ and several paths within. Similar in the Qt Creator preferences (Designer > model paths).
What am I missing? How to get it?