instructions

Instructions for clearing expired DigiCert SSL certificate on OSX by [https://gist.github.com/agraves](agraves)

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) Order by Expires column on the RHS.
5) Look for the expired DigiCert certificate on the RHS. It will have a red X on it and it's expiration date is July 26th (or "today").
6) Right-click the certificate and select "Delete DigiCert..."

That will fix the problem but you may need to close and open Chrome to get it working again.