Cannot read gmail on macbook

[mrmarkuz (Markus Neuberger)]

I am not a MAC user but there should be proxy settings:

How to make Apple Mail.app to use SOCKS proxy configured by a PAC file

Here is the original thread to have some infos about the environment of @nicovon:

Spotify offline only on mac

Hello, why spotify (the client) works only on windows computers, while on a mac it continues to use the offline mode because it does not detect an internet connection? in the filter, to unlock access to the spotify client, I used the option “Block IP access to websites” … if it is active, the client does not detect connection, if it is deactivated it works and I can listen to music. however this does not work on mac. what else can I do?