So there is this Qt Creator freeze when reconfiguring a CMake project that has already be existing for the few past Qt Creator versions.

Reproducer:

• clone a big project, I use qt here
• open it in Qt Creator
• build the project once, I built the qtdeclarative_src target
• modify a .cmake file: I add a newline to qt/qtdeclarative/src/qml/Qt6QmlMacros.cmake
• build the project
• in the Compile Output pane, wait until CMake is done regenerating the project
• now Qt Creator starts freezing for a few seconds

The freeze happens inside some macos library at FSEvents`FSEventStreamFlushSync, see attached stacktrace, inside of "thread 1" (which is the GUI thread).

I also have a screenshot from the profiler, where you can see that FSEventStreamFlushSync uses 12.54 seconds from the captured 15 seconds inside the GUI thread (called Main Thread in the screenshot):

I am using an arm macbook, with macos 15.5.