I'm a Mac user. I used Protanki for a few years and the solution was so simple. Just donwload the required files but not the ".exe", which is the installer. The instaler will never work on a Mac but you can copy the proper files "by hand" to the "resmod" folder. Therefore, the solution for Mac users is to be able to download the mod files instead of the installer.
So, please, provide this files in a zip file for us.