Not sure if this was a Skype or a Norton update over the last days but something changed and now Skype isn’t working anymore.
I use Mac, OS X 10.12.4, Skype 7.51, Norton Internet Security 7.4
Skype has been added to the application blocking list as “allowed” (see screenshot) but when app blocking is active, Skype cannot connect and comes back with an error message after some time that Skype isn’t available.
If I deactivate Firewall Apps Blocking, Skype works fine.
My user has admin rights on the Mac.