title: How to export certificate from Mac OS X to get pair of .cert and .key files ?
body: <p>I have on Mac 10.10.1 created certificate and I have in keychain access certificate with private key. On Windows I have to use this and I need .cert and .key file. How to export this certificate to get those two files ? 
  I can export as .pb12 or .cert but cannot export as pair .cert and .key (private key ) </p>