Editing Setup SSL on Synology NAS (section)

=== Trust the certificate authority locally ===

==== Mac OS ====

Export the certificate.

* '''DSM''' > '''Control Panel''' > '''Security''' > '''Certificate'''
* Select the certificate in the list.
* '''Action''' > '''Export certificate'''
* Save the zip file locally and expand it. 

Add certificate issuer to keychain as a trusted certificate authority.

* Double click on the certificate (`cert.pem`) to open the Mac OS '''Keychain Access''' app. 
* '''Add Certificate''' dialog will open automatically the first time the host is added.
** Set '''Keychain''' to "system".
** Click '''Add'''.
** Enter password into admin credentials prompt.
* '''Keychain Access''' app > '''System Keychains''' group > '''System'''
* Look for the host under '''Name''' and double click that line.
** Expand the '''Trust''' group. 
** '''When using this certificate:''' Always trust
** Close the dialog.
** Enter password into admin credentials prompt.