Untrusted SSL Connections

Almost all SSL connections are shown as untrusted since I upgraded to OSX 10.11 beta 2. This only happens inside our corporate network. Could this have something to do with App Transport Security?

Replies

Here is a screenshot of Chrome: http://i.imgur.com/14ypMIP.png

Quite possibly; iOS 9 and OSX 10.11 require TLSv1.2 SSL for all hosts you plan to request data from. If it's 1.1 or lower, you need to specify exception domains.

Well, I can't specify this for 3rd party apps or commandline tools. So basically the whole OS becomes unusable.

This happened to me to. The effect, among the others, is that neither App Store or Apple Feedback are working, an unconfortable lock-in situation.
However in some cases SSL signing authorities trust can be manually fixed. See https://forums.developer.apple.com/thread/8313?q=ssl