This article describes a way of changing Safari's default search engine. This instruction assumes you are familiar with the vi text editor. First, quit Safari and make a backup copy of the application. Then follow these steps:
To add to all the above:
To change the default from www.google.com to www.ixquick.com do the following:
Fire up Terminal and cd to
copy (cp) the file Safari to Safari.old (in case you make a mistake)
Edit the Safari file with vi or your favorite editor:
search for the string:
And replace it with:
Make sure the string is exact (it has the same length as the original string).
Save the file and quit the editor.
Fire up Safari