Hi, we are building GoldenCheetah FOSS binaries for Windows and Linux using Qt 6.8.3 successfully after your latest image updates after fixing slow building enabling PCH, so far so good and we are very grateful.
For macOS builds we are using macos-sonoma images but the included Qt versions are rather old (6.5.3 and 6.6.1), it would be possible to upgrade to latest LTS 6.8.3?

The following script works for our purposes:

# Install Qt 6.8.3 using aqtinstall
python3.12 -m venv aqtinstall
aqtinstall/bin/pip install -U pip
aqtinstall/bin/pip install aqtinstall
sudo aqtinstall/bin/aqt install-qt mac desktop 6.8.3 clang_64 -O $HOME/Qt -m  qt5compat qtcharts qtconnectivity qtmultimedia qtpositioning qtsensors qtserialport qtwebchannel qtwebengine
export QTDIR=$HOME/Qt/6.8.3/macos
export PATH=$QTDIR/bin:$PATH
qmake --version

Thanks in advance and best regards, Ale.