When you visit a URL and get a 'browser not trusted' or similar error, that may mean that the SSL certificate for this URL doesn't match the actual URL. The certificate must match the URL you're visiting.
The certificate domain name must match the URL you are visiting. Check using 'View Certificates' to see if the domain name on the certificate matches the domain name in the URL that you are going to.
To utilize the 'View Certificates' option from within Google Chrome (on a Mac):
Click the lock icon on the left-hand side of the browser URL
Click the Connection tab
Click Certificate Information
Click the Details dropdown arrow
View the SSL certificate info shown
If that seems correct and you're still having issues, check your Internet Options to make sure that 'Use SSL 3.0' option is selected in the Advanced section.
Lastly, the certificate may not be installed correctly! If you think this may be the case, or if you have any questions at all, get in touch. We can help.