Why can't I load websites in Safari 5?
Safari 5 is outdated, unsupported, and uses insecure ciphers and protocols for SSL and TLS. The last security update for Safari 5 was in 2013. Please discontinue the use of Safari 5.
Most websites will fail to load when using https because of the lack of security updates for Safari 5.
If you must test the compatibility of your site with Safari on Windows please review the following article: