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If I try to reach flickr.com or yahoo.com, I get the message that the certificate is issued by an untrusted issuer and the CSS is not loaded. See screenshot:

enter image description here

Is that an issue on my end or does yahoo has some problems? I tried different browsers and I have this problem for more than a day now. I am running Mac OS X El Capitan...

DavidPostill
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jan
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    Possible duplicate of [Firefox "Untrusted Connection" warnings when visiting reputable HTTPS sites when using child's account](http://superuser.com/questions/853659/firefox-untrusted-connection-warnings-when-visiting-reputable-https-sites-when) – Reaces Oct 05 '15 at 08:49
  • @Reaces Not a duplicate. That question is for Windows not OS X – DavidPostill Oct 05 '15 at 08:53
  • @DavidPostill Regardless of the platform, both seem to be a case of a trusted certificate missing from the machine, as the Verisign class 3 is missing in his screenshot, which should be installed by default as [documented by apple](https://support.apple.com/en-us/HT205204). And the solution is the same as it is for windowns, import the missing certificates. As such I disagree, this is a duplicate (as both cause and answer are the same). – Reaces Oct 05 '15 at 08:57
  • @Reaces Yes, maybe it is then. – DavidPostill Oct 05 '15 at 09:08
  • @DavidPostill Sorry for the wall of text, I was trying to explain my reasoning, and reading it again I might have gone a bit overboard :) – Reaces Oct 05 '15 at 09:09
  • @Reaces No need to apologise. It is always good to fully explain your point ;) – DavidPostill Oct 05 '15 at 09:10
  • @Reaces Also possible dup of Security SE question [Why is Symantec/Verisign CA appearing as an invalid authority?](http://security.stackexchange.com/q/85830) – DavidPostill Oct 05 '15 at 09:16

1 Answers1

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Is that an issue on my end or does yahoo have some problems?

It doesn't appear to be a Yahoo issue.

It is possibly an issue with your account's keychain.

See Security SE question Why is Symantec/Verisign CA appearing as an invalid authority? for a possible explanation/solution.

On Windows 7 with Firefox 41.0.1 I get a validate certificate:

enter image description here

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DavidPostill
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