Build and install Qt6

Install dependencies

Install Xcode from the App Store.

brew install cmake ninja python@3.12 wget

Build and install Qt6 from source

cd qt6
./build_and_install_qt6.sh

Qt6 will be installed in /opt/Qt/$QT_VERSION. Also the script will skip the installation of Qt6 if it is already installed.

Clean up build files

cd $HOME/tmp/src
rm -fr qt-*