Homebrew Qt v5.11.2 recipe for older macOS versions. Used for RPCEmu on OS X < 10.12.
See the original commit and the raw formula file for details.
brew tap risc-os-open/homebrew-qt https://github.com/risc-os-open/homebrew-qt
brew install qt@5.11.2
This is the mid-2020 equivalent of this older command:
brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/56c500b569c724b049be7ab9e12d9693f85522f9/Formula/qt.rb