Welcome to Justanswer.com, my name is ***** ***** I will do my best to assist you.
How did you download a non compatible version? Did you manually find a download, and try to force it into place?
I ask because, apple software update wont install non compatible versions automatically.
Also, besides safari do you have another working browser, such as google chrome or Firefox?
Im here. Ive just seen your messages.
As youve found out, safari issues like this can be tough to fix when you try to install a version thats not compatible onto your system. For that reason, Im going to send an offer for remote support, where I can connect to your mac from here and work on solving this issue directly.