Apple - How do I bypass "this connection is not private" warnings in safari?

Press "Show Details", then press "Visit this website" on the bottom, and the "Visit Website" from the pop up.

Note: if you're still getting this issue after installing the cert, try to edit in keychain access app: locate the cert that you just installed and double click to open the cert, expand "Trust" and change "When using this certificate" option to "Always Trust" close it and refresh the page again, it should work.

I found that after deleting the certificate, and then first opening a private Safari tab and proceeding worked. After it works on the private Safari tab it should work on the regular tab as well.

For those who are having the issue where the warning page reloads over and over such as @brinkdad, check the details of the certificate from the page, then open Keychain Access and find the certificate and delete it. Refresh the page and proceed to access the website anyway. This should install the correct certificate to allow you to access the website.