There is no Internet connection
There is something wrong with the proxy server, or the address is incorrect.
Try:
Contacting the system admin
Checking the proxy address
ERR_PROXY_CONNECTION_FAILED
If you use a proxy server…
Check your proxy settings or contact your network administrator to make sure the proxy server is working. If you don't believe you should be using a proxy server: Go to Applications > System Preferences > Network > Advanced > Proxies and deselect any proxies that have been selected.
那位大咖，麻烦给我参考一下 mac代理设置
