EAP + SSL + Certificate chains

Hello, We are using freeradius with EAP/SSL and although it is working fine, I was wondering if there was a way to prevent the user from getting the prompt to accept the certificate? I have combined the intermediate and server certificates to one file and used that file in the 'certificate_file' config in eap.conf. On OSX, the certificates are marked as valid, including the root, intermediate and server, but still prompts the user to accept. Is there a way around this? Cheers, - Trevor