mac creative cloud dienste sind gesperrt überprüfen sie ihre firewall-einstellungen

if you have an old os, your default browser must support tls 1.2, https://helpx.adobe.com/x-productkb/multi/eol-tls-support.html

to test your default browser's tls you can use , https://clienttest.ssllabs.com:8443/ssltest/viewMyClient.html

otherwise try these steps, https://helpx.adobe.com/download-install/kb/unable-to-reach-adobe-servers.html

if those fail, make sure you also tried the steps at, https://helpx.adobe.com/download-install/kb/common-network-connectivity-issues.html

if that fails, try https://helpx.adobe.com/download-install/kb/cannot-verify-subscription-offline-mode.html

if those all fail, white list the adobe network endpoints, https://helpx.adobe.com/enterprise/kb/network-endpoints.html