magnet:?xt=urn:btih:f49836488fe597c715bc85ea2f9cb7be3f15ad34&xt=urn:md5:5e5da656c92629b1dafd8975886cabe7&xl=734300722&dn=qt-mac-opensource-4.7.1-debug-libs.dmg&as=https://download.qt.io/archive/qt/4.7/qt-mac-opensource-4.7.1-debug-libs.dmg&tr=http://bt.qt-project.org:6969/announce