Summary
In Apple's MacOS Monterey (also known as MacOS 12) version, plain text PAC will no longer be supported. All PAC files need to be called with https.
"Support for cleartext HTTP URL schemes for Proxy Automatic Configuration (PAC) is now deprecated. Use only HTTPS URL schemes for PAC. This affects all PAC configurations, including, but not limited to, configurations set via Settings, System Preferences, profiles, and URLSession APIs..." as stated in the macOS Monterey 12.0.1 Release Notes.
This article provides information on how to host a PAC file with https url in IWSVA.
You can download the PAC file from the HTTPS web console's path without doing anything:
For example:
[https://\{iwsva_hostname}:8443/pac_files/proxy.pac|https://iwsva65sp1:8443/pac_files/proxy.pac]
Take note that the IWSVA console certificate should be trusted by the client browser:
- Certificate CN/SAN same with IWSVA Hostname
- Issuer certificate trusted by browser's CA store