magnet:?xt=urn:btih:78741e7a6cf4dd5ab58011277d6db411e3b6a9c4&xt=urn:md5:6c58f1fe3cd7fc951faf1df03d859f46&xl=137795497&dn=qt-mac-opensource-4.5.1.dmg&as=https://download.qt.io/archive/qt/4.5/qt-mac-opensource-4.5.1.dmg&tr=http://bt.qt-project.org:6969/announce