magnet:?xt=urn:btih:7aa72277a0f2a006f8fcb391e6d7e2d6932000dc&xt=urn:md5:eb333beb3af02d2a4d3203c7acac0261&xl=136307179&dn=qt-mac-opensource-4.5.0.dmg&as=https://download.qt.io/new_archive/qt/4.5/qt-mac-opensource-4.5.0.dmg&tr=http://bt.qt-project.org:6969/announce