Hi, Is it mandatory to give access to everyone group to the /etc/designs explicitly in AEM 6.4? We have compressed clientLibs under etc/designs and they are not loading in publishers without giving access to everyone group in /etc.
That is called as "anonymous"/unauthenticated access to content. There is a user with the name "anonymous" in publish server to whom you need to assign appropriate read permissions either on the user itself or via its associated group which is 'everyone' in this case.
Anonymous access is required for /content & /etc paths for the app to work. Make sure to limit down the read access to specific paths.