Certificate Administration in Apple OS X
Importing a Certificate to the Certificate Administration of Apple OS X
- In the finder, double-click on the file with the FRITZ!Box certificate.
 - In the "Keychain" drop-down menu, select the "System" entry.
 - Click on "Add".
 - Enter the password of the Apple OS X user account with which you are currently logged in.
 - Click on "Change Keychain".
 - Click on "Always Trust".
 - Enter the password of the Apple OS X user account with which you are currently logged in.
 - Click on “Refresh Settings”.