To install qt69-qtdeclarative, run the following command in macOS terminal (Applications->Utilities->Terminal)
sudo port install qt69-qtdeclarative
To see what files were installed by qt69-qtdeclarative, run:
port contents qt69-qtdeclarative
To later upgrade qt69-qtdeclarative, run:
sudo port selfupdate && sudo port upgrade qt69-qtdeclarative
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