You may get some error like given below in Mac machines when you browse SSL pages

Safari can’t verify the identity of the website “example.com” The certificate for this website was signed by an unknown certifying authority. You might be connectng tp a website that is preteneing to be “domainname.com”, which could put your confidential information at risk. Would you like to connect to the website anyway ?

To fix the problem add SSLCertificateChainFile to your apache configuration file

SSLEngine On
SSLCertificateFile /etc/httpd/ssl/*.example.com.crt
SSLCertificateKeyFile /etc/httpd/ssl/*.example.com.key
SSLCertificateChainFile /etc/httpd/ssl/gd_bundle.crt