Steps to reproduce the issue

Install Joomla (tested version was Joomla 3.4.4) on an OS X Server running Server 5.0.3. Set Joomla to Force SSL on entire site.

Expected result

All pages on the site should load via SSL

Actual result

No page will load and the browser reports 'Too Many Redirects'

System information (as much as possible)

Mac Pro Server Running OS X 10.10.5 with Server 5.0.3 installed. Joomla 3.4.4, MySQL 5.6.22, PHP version 5.5.27, Apache 2.4.16.

Additional comments

Apple setup apache in Server 5.0.3 as a Reverse Proxy. With Joomla set to force SSL, the client would connect to the proxy and the proxy would forward the request to the Joomla site. Joomla would check $_SERVER['HTTPS'] to verify if the connection was over SSL. With the Apache Reverse Proxy, the variable $_SERVER['HTTPS'] doesn't exist so Joomla would assume that the connection was not SSL so it would redirect the user to SSL. The client would now connect to the proxy via SSL. Again, the proxy would send the request to the Joomla site and again, Joomla would check $_SERVER['HTTPS'] and find the variable didn't exist and assume the client was coming in as non SSL and redirect them. This continues until the browser gives up and and gives the error 'Too Many Redirects'. After researching the Apache Reverse Proxy (and others) I determined that the proxy sends the variable $_SERVER['HTTP_X_FORWARDED_PROTO'] to indicate SSL (the value in the variable for SSL is 'https'). To solve the issue, I edited the uri.php file in 'libraries/joomla/uri' and at line 66 I changed this:

if ((isset($_SERVER['HTTPS']) && !empty($_SERVER['HTTPS']) && (strtolower($_SERVER['HTTPS']) != 'off')))

to this:

if ((isset($_SERVER['HTTPS']) && !empty($_SERVER['HTTPS']) && (strtolower($_SERVER['HTTPS']) != 'off')) ||
    (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && !empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && (strtolower($_SERVER['HTTP_X_FORWARDED_PROTO']) != 'off')))

Now Joomla checks $_SERVER['HTTPS'] and $_SERVER['HTTP_X_FORWARDED_PROTO'] to validate if the client is connecting via SSL. This has solved the problem on the Joomla sites I am hosting. If I see other side effects moving forward, I will post them.