How to prevent Safari 6.0.2 unexpected crashes in Mountain Lion?
Open the Terminal app (found in /Applications/Utilties/).
Copy the following as one line (from “curl” through “.pkg”) and paste it into the Terminal window after the “$ ” prompt:

curl -O http://swcdn.apple.com/content/downloads/37/23/041-5058/lr5tynbldi18zcrqo8a8uq88 rnjushqliu/Safari6Lion.pkg


then hit return.

You should see it count down the time. When it stops, look in your home folder (the one with the little house and your user name) for “Safari6Lion.pkg”. Double-click to launch the installer.

Here is an alternative solution that seems to be working for several users, especially those who have somehow managed to install more than one WebKit framework:


Open Finder and navigate to:
/System/Library/StagedFrameworks/Safari/ Drag WebKit.framework to
the trash
Run software update and install Safari > do not launch safari after
    it is installed
Restart computer
Launch Safari


Let's try!