Remove expired digicert certs

instructions

Instructions for clearing expired DigiCert SSL certificate on OSX

NOTICE: The following instructions "worked for me." Proceed at your own risk.

Symptoms:

* Visiting several sites, such as github, gravatar, twitter's CDN results in "invalid certificate" errors
* For example: http://i.imgur.com/8gPRfI3.png

Instructions

1) Launch Keychain Access
  * ⌘-Space
  * Type "Keychain Access"
  * Hit return
2) Select "Show Expired Certificates" from the "View" menu.
3) Click the "login" section in the upper-left corner under "Keychains"
4) Look for the expired DigiCert certificate in the main pane to the right. It will have a red X on it. Look for the one whose expiration date is July 26th.
5) Right-click the certificate and select "Delete DigiCert etc etc etc"

You should once again be able to access the affected sites.