While looking through the invisible button-labels caused by Qt 6.8.2, I stumbled over the use of a macro Q_OS_MAX:
$ rg Q_OS_MAX src
src/Gui/SplitActivityWizard.cpp
35:#ifdef Q_OS_MAX
src/Charts/UserChart.cpp
852:#ifdef Q_OS_MAX
888:#ifdef Q_OS_MAX
src/Charts/ReferenceLineDialog.cpp
61:#ifdef Q_OS_MAX
src/Charts/AllPlotWindow.cpp
127:#ifdef Q_OS_MAX
src/Charts/LTMTool.cpp
255:#ifdef Q_OS_MAX
src/Charts/ExhaustionDialog.cpp
59:#ifdef Q_OS_MAX
src/Gui/PerspectiveDialog.cpp
46:#ifdef Q_OS_MAX
63:#ifdef Q_OS_MAX
src/FileIO/XDataDialog.cpp
47:#ifdef Q_OS_MAX
61:#ifdef Q_OS_MAX
As I couldn't find any reference to this in the Qt-docs, I assume it should be Q_OS_MAC instead. Are my thoughts correct, should I create a PR?