Edit: Right on, tacit!
>
I downloaded it from Softonic.>
You have MacOS X 10.7.5. This application requires Mac OS x 10.8 or later.There you go... That's why you should
never d/l Apple software from a source other than Apple, itself (via Software Update).
SU would not have offered you the Safari 6.0.2 d/l if it is not compatible with the version of OS X you're running.
And further, you never know precisely what you're getting when you use a 3rd party source.