magnet:?xt=urn:btih:75c6f1c7571ecf6e121b69b1fd6070e16c96c2e3&xt=urn:md5:db1d59945443e1fb033a4b87f5618e73&xl=219285497&dn=qt-mac-opensource-4.7.2.dmg&as=https://download.qt.io/archive/qt/4.7/qt-mac-opensource-4.7.2.dmg&tr=http://bt.qt-project.org:6969/announce