Note: Minimum requirement is Safari 5.1.
Note: Safari 7 and greater require you to not have Block cookies and other website data set to Always.
Note: As great a browser as Safari is, all versions before Safari 9 have certain browser limitations and are not as capable at things like blocking ads. Please make sure to upgrade to at least OSX 10.11 and Safari 9 to block like Chrome, Firefox, and Opera.
Depending on your settings and your version of Safari, you may need to find and open the Options download in your Downloads folder.
Install: When you see something similar to these:
you must select the “Install” or “Trust” button.
Uninstall and Update: please see the Safari section of the manual.