I'm behind a proxy and some websites don't work, in particular ones related to MacOS update, app store etc. I imported the proxy certificate to the MacOS keychain. When I go to https://apps.apple.com with Safari I can't proceed to the website even if I add the certificate manually to the trust store. The error during visiting the site is:
"certificates do not meet pinning requirements".
The same site works when using Chrome which also uses KeyChain. So Safari and other native MacOS apps still seem to do something different and sometimes ignore certificates for proxies. Is there some way to disable this pinning?
openssl output of the certificate: