magnet:?xt=urn:btih:f8e6983636730c8f85ee6a69a08a209f2d2f19ae&xt=urn:md5:1e4553c2da59c95882ff32de8a61b397&xl=193540165&dn=qt-mac-cocoa-opensource-4.5.3.dmg&as=https://download.qt.io/new_archive/qt/4.5/qt-mac-cocoa-opensource-4.5.3.dmg&tr=http://bt.qt-project.org:6969/announce