Sorry for the dumb question, but I\'ve been getting this on Xcode. I\'m not sure
None of the certificates in the CA chain for GitHub appears to have just expired or be closed to expire.
This article (on rail app, but also relevant here) suggests:
/opt/local/etc/openssl
:$ cd /opt/local/etc/openssl $ sudo curl -O http://curl.haxx.se/ca/cacert.pem $ sudo mv cacert.pem cert.pem $ setenv SSL_CERT_FILE /opt/local/etc/openssl/cacert.pem
Anyone facing this issue, quit your proxy and try again.
Just click "Show Certificate", unfold the disclosure arrow and set the "Trust" dropdown option menu to "Always Trust". Accept and re-enter your password if asked. It should be fine now. (Sorry for not being more precise, but I don't have the Certificate window under my eyes right now.)