Safari® does not trust self-signed certificates by default. To resolve this problem, the SSL certificate of the NAS must be added to Safari®’s trusted list:
Open Safari, and in the address bar enter “https://[Your NAS IP Address]:8089”. For example: “https://192.168.1.100:8089”.
Safari® will pop up a dialog box saying that the website cannot be verified. Click “Show Certificate”.
Note: 8089 is the default SSL port for Virtualization Station. If this has been changed, then change the port number in the address above to the one set under “Virtualization Station > Preferences > Virtualization Station (SSL) > Port”
Select “Always trust “QNAP NAS” when connecting to “[Your NAS IP Address]””. Click “Continue”.
Enter your Mac password, and then click “Update Settings”.
When you next log into Virtualization Station using Safari, the web user interface will be displayed properly.