Similar questions:
- https://forums.plex.tv/t/using-an-http-proxy-for-fetching-metadata/162215/10
- https://forums.plex.tv/t/any-hope-for-plex-to-actually-work-with-a-web-proxy/6752
- https://forums.plex.tv/t/is-there-way-to-specify-a-proxy-for-media-server/23050
- https://forums.plex.tv/t/more-automatic-proxy-configuration/521/7
This post helps you set up plex to access scraper API (thetvdb for example) via your proxy on macOS. Plex doesn't respect the system-level sock proxy (in Network settings), but it respects the HTTP_PROXY and HTTPS_PROXY variables.