The Heartbleed vulnerability affected websites hosted on servers running insecure versions of OpenSSL. This vulnerability was from several years ago and websites would have already updated and patched their software where applicable. The Mac operating system OS X was never affected directly. As such, I was not able to find the commands you were inquiring about either on our site or elsewhere.
Do you happen to have the link to the article you mentioned? We can take a look to see what it was discussing and how to find the information that was “cut off”.