OS X UI upgrade

electron.js

@@ -638,7 +638,7 @@ ipcMain.on(Constants.IPC_Install_Upgrade, (event, data) => {
       });
   } else if (data.Source.toLocaleLowerCase().endsWith('.dmg')) {
     helpers
-      .executeAsync('hdiutil', ['attach', data.Source])
+      .executeAsync('open', ['-a', 'Finder', data.Source])
       .then(() => {
         closeApplication();
       })