I can't validate this site, I'm providing this purely as information. Use at your own peril -But do tell if you get it to work. I tried to cp the SysCACerts into System/Library/Keychains as root but I was still denied. Maybe I did it wrong so let me know if it works for you... SystemCACertificates.keychain here:
https://github.com/aosm/security_certificates/tree/master/BuiltKeychains
https://github.com/aosm/security_certificates/tree/master/BuiltKeychains