

Many popular sites use this certificate and once it has expired, some (not all) users stopped being able to visit those sites. Though the error/warning messages that get shown in the browser may differ, the underlying issue stays the same and that is the recent expiration of the widespread DST Root CA X3 certificate, created by the non-profit organization Let’s Encrypt. Another one is “ Your connection is not private” or “ Attackers might be trying to steal your information”. The error message shown may vary – “ DST Root CA X3 expired” is only one possible error message. Recently, many Mac users have started reporting the same problem with their browsers, namely, the appearance of an error message while trying to visit certain sites. The DST Root CA X3 expired on Mac error prevents users from visiting sites that use Let’s Encrypt certificates.

