No safari Extensions Certificate detected

I have followed these steps to create a certificate for building safari extensions. On my developer account it is showing expiry date to be 10th May 2017. My certificate file is on my desktop. i had double clicked it and now the certificate is also showing in my keychain access.

But whenever i open Extension builder it show NO SAFARI EXTENSIONS CERTIFICATE.

Do I need to upload that downloaded certificate in safari somewhere or elsewhere?

Any help would be highly appreciated !!

Replies

Finally, I myself have got the answer. For Mac users, just update your OSX and safari to the latest version. And the certificate will get detected.

I am already on the latest versions. I have tried revoking the old certificate, created a new one, installed and restarted MBP but safari extensions builder still says "No safari extensions certificate". I have also tried clearing the cookies and cache in vein.

Will apple respond on this issue?