magnet:?xt=urn:btih:2d71a7baee7c25ef93b1b82a76acbb04e3b408f8&xt=urn:md5:9c3f90d1a49eec4976059ff688355c7d&xl=191025808&dn=qt-mac-opensource-4.8.1.dmg&as=https://download.qt.io/archive/qt/4.8/4.8.1/qt-mac-opensource-4.8.1.dmg&tr=http://bt.qt-project.org:6969/announce