The 1.0 version of TinyPAC for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this free Mac application is Langui.net. The program relates to Internet & Network Tools. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
TinyPAC is a simple HTTP server that allows you host your .pac files easily.
How to Use TinyPAC
1. Launch TinyPAC
2. Start the PAC service
3. Switch to the "PAC" tab and add a configuration file
4. Select the previously created item and you'll see the PAC file URLs on the button right
5. Use the above URLs to configure your web browser / client
You may want to check out more Mac applications, such as tn3270, which might be similar to TinyPAC.